diff --git a/test/csit/tests/dcaegen2/testcases/dcae_ves.robot b/test/csit/tests/dcaegen2/testcases/dcae_ves.robot
index 393359f..daed35f 100644
--- a/test/csit/tests/dcaegen2/testcases/dcae_ves.robot
+++ b/test/csit/tests/dcaegen2/testcases/dcae_ves.robot
@@ -5,8 +5,9 @@
 Library           Collections
 Library           DcaeLibrary
 Resource          resources/dcae_keywords.robot
+Resource          ../../common.robot
 Test Setup        Cleanup VES Events
-Suite Setup       VES Collector Suite Setup DMaaP
+Suite Setup       Run keywords  VES Collector Suite Setup DMaaP  Create sessions  Create header
 Suite Teardown    VES Collector Suite Shutdown DMaaP    
 
 *** Variables ***
@@ -15,13 +16,12 @@
 ${VES_ANY_EVENT_PATH}                    /eventListener/v5
 ${VES_BATCH_EVENT_PATH}             	 /eventListener/v5/eventBatch
 ${VES_THROTTLE_STATE_EVENT_PATH}         /eventListener/v5/clientThrottlingState
-${HEADER_STRING}                         content-type=application/json
 ${EVENT_DATA_FILE}                       %{WORKSPACE}/test/csit/tests/dcaegen2/testcases/assets/json_events/ves_volte_single_fault_event.json
 ${EVENT_MEASURE_FILE}                    %{WORKSPACE}/test/csit/tests/dcaegen2/testcases/assets/json_events/ves_vfirewall_measurement.json
 ${EVENT_DATA_FILE_BAD}                   %{WORKSPACE}/test/csit/tests/dcaegen2/testcases/assets/json_events/ves_volte_single_fault_event_bad.json
 ${EVENT_BATCH_DATA_FILE}                 %{WORKSPACE}/test/csit/tests/dcaegen2/testcases/assets/json_events/ves_volte_fault_eventlist_batch.json
 ${EVENT_THROTTLING_STATE_DATA_FILE}      %{WORKSPACE}/test/csit/tests/dcaegen2/testcases/assets/json_events/ves_volte_fault_provide_throttle_state.json
-${EVENT_PNF_REGISTRATION}               %{WORKSPACE}/test/csit/tests/dcaegen2/testcases/assets/json_events/ves_pnf_registration_event.json
+${EVENT_PNF_REGISTRATION}                %{WORKSPACE}/test/csit/tests/dcaegen2/testcases/assets/json_events/ves_pnf_registration_event.json
 
 #DCAE Health Check
 ${CONFIG_BINDING_URL}                    http://localhost:8443
@@ -30,22 +30,20 @@
 ${VES_Service_Name1}                     dcae-controller-ves-collector
 ${VES_Service_Name2}                     ves-collector-not-exist
 
-*** Test Cases ***    
+*** Test Cases ***
 VES Collector Health Check
     [Tags]    DCAE-VESC-R1
     [Documentation]   Ves Collector Health Check
     ${uuid}=    Generate UUID
-    ${session}=    Create Session 	dcae 	${VESC_URL}
     ${headers}=  Create Dictionary     Accept=*/*     X-TransactionId=${GLOBAL_APPLICATION_ID}-${uuid}    X-FromAppId=${GLOBAL_APPLICATION_ID}
-    ${resp}= 	Get Request 	dcae 	/healthcheck        headers=${headers}
+    ${resp}= 	Get Request 	${suite_dcae_vesc_url_session} 	/healthcheck        headers=${headers}
     Should Be Equal As Strings 	${resp.status_code} 	200  
 
 Publish Single VES VoLTE Fault Event
     [Tags]    DCAE-VESC-R1
     [Documentation]   Post single event and expect 200 Response 
-    ${evtdata}=   Get Event Data From File   ${EVENT_DATA_FILE}
-    ${headers}=   Create Header From String    ${HEADER_STRING}
-    ${resp}=  Publish Event To VES Collector No Auth    ${VESC_URL}  ${VES_ANY_EVENT_PATH}  ${headers}  ${evtdata}
+    ${evtdata}=   Get Data From File   ${EVENT_DATA_FILE}
+    ${resp}=  Publish Event To VES Collector No Auth    ${VES_ANY_EVENT_PATH}  ${evtdata}
     Log    Receive HTTP Status code ${resp.status_code}
     Should Be Equal As Strings 	${resp.status_code} 	200
     ${isEmpty}=   Is Json Empty    ${resp}
@@ -56,9 +54,8 @@
 Publish Single VES VNF Measurement Event
     [Tags]    DCAE-VESC-R1
     [Documentation]   Post single event and expect 200 Response 
-    ${evtdata}=   Get Event Data From File   ${EVENT_MEASURE_FILE}
-    ${headers}=   Create Header From String    ${HEADER_STRING}
-    ${resp}=  Publish Event To VES Collector No Auth    ${VESC_URL}   ${VES_ANY_EVENT_PATH}  ${headers}  ${evtdata}
+    ${evtdata}=   Get Data From File   ${EVENT_MEASURE_FILE}
+    ${resp}=  Publish Event To VES Collector No Auth    ${VES_ANY_EVENT_PATH}  ${evtdata}
     Log    Receive HTTP Status code ${resp.status_code}
     Should Be Equal As Strings 	${resp.status_code} 	200
     ${isEmpty}=   Is Json Empty    ${resp}
@@ -69,9 +66,8 @@
 Publish VES VoLTE Fault Batch Events
     [Tags]    DCAE-VESC-R1
     [Documentation]   Post batched events and expect 200 Response 
-    ${evtdata}=   Get Event Data From File   ${EVENT_BATCH_DATA_FILE}
-    ${headers}=   Create Header From String    ${HEADER_STRING}
-    ${resp}=  Publish Event To VES Collector No Auth    ${VESC_URL}  ${VES_BATCH_EVENT_PATH}  ${headers}  ${evtdata}
+    ${evtdata}=   Get Data From File   ${EVENT_BATCH_DATA_FILE}
+    ${resp}=  Publish Event To VES Collector No Auth    ${VES_BATCH_EVENT_PATH}  ${evtdata}
     Should Be Equal As Strings 	${resp.status_code} 	200
     #${ret}=  DMaaP Message Receive    ab305d54-85b4-a31b-7db2-fb6b9e546016
     ${ret}=  DMaaP Message Receive    ab305d54-85b4-a31b-7db2-fb6b9e546025
@@ -80,10 +76,9 @@
 Publish Single VES VoLTE Fault Event With Bad Data
     [Tags]    DCAE-VESC-R1
     [Documentation]    Run with JSON Envent with missing comma to expect 400 response
-    ${evtdata}=   Get Event Data From File   ${EVENT_DATA_FILE_BAD}
-    ${headers}=   Create Header From String    ${HEADER_STRING}  
+    ${evtdata}=   Get Data From File   ${EVENT_DATA_FILE_BAD}
     Log   Send HTTP Request with invalid Json Event Data
-    ${resp}=  Publish Event To VES Collector No Auth    ${VESC_URL}  ${VES_ANY_EVENT_PATH}  ${headers}  ${evtdata}
+    ${resp}=  Publish Event To VES Collector No Auth    ${VES_ANY_EVENT_PATH}  ${evtdata}
     Log    Receive HTTP Status code ${resp.status_code}
     Should Be Equal As Strings 	${resp.status_code} 	400
     ${isEmpty}=   Is Json Empty    ${resp}
@@ -92,20 +87,18 @@
 Publish VES Event With Invalid Method
     [Tags]    DCAE-VESC-R1
     [Documentation]    Use invalid Put instead of Post method to expect 405 response
-    ${evtdata}=   Get Event Data From File   ${EVENT_DATA_FILE}
-    ${headers}=   Create Header From String    ${HEADER_STRING}
+    ${evtdata}=   Get Data From File   ${EVENT_DATA_FILE}
     Log   Send HTTP Request with invalid method Put instead of Post
-    ${resp}=  Publish Event To VES Collector With Put Method No Auth  ${VESC_URL}  ${VES_ANY_EVENT_PATH}  ${headers}  ${evtdata}
+    ${resp}=  Publish Event To VES Collector With Put Method No Auth  ${VES_ANY_EVENT_PATH}  ${evtdata}
     Log    Receive HTTP Status code ${resp.status_code}
     Should Be Equal As Strings 	${resp.status_code} 	404 
     
 Publish VES Event With Invalid URL Path
     [Tags]    DCAE-VESC-R1
     [Documentation]    Use invalid url path to expect 404 response
-    ${evtdata}=   Get Event Data From File   ${EVENT_DATA_FILE}
-    ${headers}=   Create Header From String    ${HEADER_STRING}
+    ${evtdata}=   Get Data From File   ${EVENT_DATA_FILE}
     Log   Send HTTP Request with invalid /listener/v5/ instead of /eventListener/v5 path
-    ${resp}=  Publish Event To VES Collector No Auth    ${VESC_URL}  /listener/v5/  ${headers}  ${evtdata}
+    ${resp}=  Publish Event To VES Collector No Auth    /listener/v5/  ${evtdata}
     Log    Receive HTTP Status code ${resp.status_code}
     Should Be Equal As Strings 	${resp.status_code} 	404    
     
@@ -123,10 +116,9 @@
 Publish Single VES Fault Event Over HTTPS
     [Tags]    DCAE-VESC-R1
     [Documentation]   Post single event and expect 200 Response 
-    ${evtdata}=   Get Event Data From File   ${EVENT_DATA_FILE}
-    ${headers}=   Create Header From String    ${HEADER_STRING}
+    ${evtdata}=   Get Data From File   ${EVENT_DATA_FILE}
     Log  Login User=${VESC_HTTPS_USER}, Pd=${VESC_HTTPS_PD}
-    ${resp}=  Publish Event To VES Collector    ${VESC_URL_HTTPS}  ${VES_ANY_EVENT_PATH}  ${headers}  ${evtdata}  sample1  sample1
+    ${resp}=  Publish Event To VES Collector    ${VES_ANY_EVENT_PATH}  ${evtdata}
     Log    Receive HTTP Status code ${resp.status_code}
     Should Be Equal As Strings 	${resp.status_code} 	200
     ${isEmpty}=   Is Json Empty    ${resp}
@@ -137,9 +129,8 @@
 Publish Single VES Measurement Event Over HTTPS
     [Tags]    DCAE-VESC-R1
     [Documentation]   Post single event and expect 200 Response 
-    ${evtdata}=   Get Event Data From File   ${EVENT_MEASURE_FILE}
-    ${headers}=   Create Header From String    ${HEADER_STRING}
-    ${resp}=  Publish Event To VES Collector  ${VESC_URL_HTTPS}  ${VES_ANY_EVENT_PATH}  ${headers}  ${evtdata}  ${VESC_HTTPS_USER}  ${VESC_HTTPS_PD}
+    ${evtdata}=   Get Data From File   ${EVENT_MEASURE_FILE}
+    ${resp}=  Publish Event To VES Collector  ${VES_ANY_EVENT_PATH}  ${evtdata}
     Log    Receive HTTP Status code ${resp.status_code}
     Should Be Equal As Strings 	${resp.status_code} 	200
     ${isEmpty}=   Is Json Empty    ${resp}
@@ -150,9 +141,8 @@
 Publish VES Fault Batch Events Over HTTPS
     [Tags]    DCAE-VESC-R1
     [Documentation]   Post batched events and expect 202 Response 
-    ${evtdata}=   Get Event Data From File   ${EVENT_BATCH_DATA_FILE}
-    ${headers}=   Create Header From String    ${HEADER_STRING}
-    ${resp}=  Publish Event To VES Collector  ${VESC_URL_HTTPS}  ${VES_BATCH_EVENT_PATH}  ${headers}  ${evtdata}  ${VESC_HTTPS_USER}  ${VESC_HTTPS_PD}
+    ${evtdata}=   Get Data From File   ${EVENT_BATCH_DATA_FILE}
+    ${resp}=  Publish Event To VES Collector  ${VES_BATCH_EVENT_PATH}  ${evtdata}
     Should Be Equal As Strings 	${resp.status_code} 	200
     #${ret}=  DMaaP Message Receive    ab305d54-85b4-a31b-7db2-fb6b9e546016
     ${ret}=  DMaaP Message Receive    ab305d54-85b4-a31b-7db2-fb6b9e546025
@@ -161,19 +151,17 @@
 Publish VES Event With Invalid URL Path HTTPS
     [Tags]    DCAE-VESC-R1
     [Documentation]    Use invalid url path to expect 404 response
-    ${evtdata}=   Get Event Data From File   ${EVENT_DATA_FILE}
-    ${headers}=   Create Header From String    ${HEADER_STRING}
+    ${evtdata}=   Get Data From File   ${EVENT_DATA_FILE}
     Log   Send HTTP Request with invalid /eventlistener/v5/ instead of /eventListener/v5 path
-    ${resp}=  Publish Event To VES Collector  ${VESC_URL_HTTPS}  /eventlistener/v5  ${headers}  ${evtdata}  ${VESC_HTTPS_USER}  ${VESC_HTTPS_PD}
+    ${resp}=  Publish Event To VES Collector  /eventlistener/v5  ${evtdata}
     Log    Receive HTTP Status code ${resp.status_code}
     Should Be Equal As Strings 	${resp.status_code} 	404
     
 Publish PNF Registration Event  
     [Tags]    DCAE-VESC-R1
     [Documentation]   Post PNF registration event and expect 200 Response 
-    ${evtdata}=   Get Event Data From File   ${EVENT_PNF_REGISTRATION}
-    ${headers}=   Create Header From String    ${HEADER_STRING}
-    ${resp}=  Publish Event To VES Collector No Auth    ${VESC_URL}  ${VES_ANY_EVENT_PATH}  ${headers}  ${evtdata}
+    ${evtdata}=   Get Data From File   ${EVENT_PNF_REGISTRATION}
+    ${resp}=  Publish Event To VES Collector No Auth    ${VES_ANY_EVENT_PATH}  ${evtdata}
     Log    Receive HTTP Status code ${resp.status_code}
     Should Be Equal As Strings 	${resp.status_code} 	200
     ${isEmpty}=   Is Json Empty    ${resp}
diff --git a/test/csit/tests/dcaegen2/testcases/resources/DMaaP.py b/test/csit/tests/dcaegen2/testcases/resources/DMaaP.py
index db59557..092b608 100644
--- a/test/csit/tests/dcaegen2/testcases/resources/DMaaP.py
+++ b/test/csit/tests/dcaegen2/testcases/resources/DMaaP.py
@@ -8,9 +8,13 @@
 import BaseHTTPServer
 import urllib
 import urlparse
-import cgi, sys, shutil, mimetypes
+import cgi
+import sys
+import shutil
+import mimetypes
 from jsonschema import validate
-import jsonschema, json
+import jsonschema
+import json
 import DcaeVariables
 import SimpleHTTPServer
 from robot.api import logger
@@ -25,7 +29,7 @@
 DMaaPHttpd = None
 
 
-def cleanUpEvent():
+def clean_up_event():
     sz = DcaeVariables.VESEventQ.qsize()
     for i in range(sz):
         try:
@@ -33,8 +37,9 @@
         except:
             pass
 
-def enqueEvent(evt):
-    if DcaeVariables.VESEventQ != None:
+
+def enque_event(evt):
+    if DcaeVariables.VESEventQ is not None:
         try:
             DcaeVariables.VESEventQ.put(evt)
             if DcaeVariables.IsRobotRun:
@@ -46,12 +51,13 @@
             print (str(e))
             return False
     return False
-            
-def dequeEvent(waitSec=25):
+
+
+def deque_event(wait_sec=25):
     if DcaeVariables.IsRobotRun:
         logger.console("Enter DequeEvent")
     try:
-        evt = DcaeVariables.VESEventQ.get(True, waitSec)
+        evt = DcaeVariables.VESEventQ.get(True, wait_sec)
         if DcaeVariables.IsRobotRun:
             logger.console("DMaaP Event dequeued - size=" + str(len(evt)))
         else:
@@ -64,7 +70,8 @@
         else:
             print("DMaaP Event dequeue timeout")
         return None
- 
+
+
 class DMaaPHandler(BaseHTTPServer.BaseHTTPRequestHandler):
       
     def do_PUT(self):
@@ -73,7 +80,7 @@
         
     def do_POST(self):
         
-        respCode = 0
+        resp_code = 0
         # Parse the form data posted
         '''
         form = cgi.FieldStorage(
@@ -95,21 +102,21 @@
         '''
         
         if 'POST' not in self.requestline:
-            respCode = 405
+            resp_code = 405
             
         '''
-        if respCode == 0:
+        if resp_code == 0:
             if '/eventlistener/v5' not in self.requestline and '/eventlistener/v5/eventBatch' not in self.requestline and \
                         '/eventlistener/v5/clientThrottlingState' not in self.requestline:
-                respCode = 404
+                resp_code = 404
          
         
-        if respCode == 0:
+        if resp_code == 0:
             if 'Y29uc29sZTpaakprWWpsbE1qbGpNVEkyTTJJeg==' not in str(self.headers):
-                respCode = 401
+                resp_code = 401
         '''  
         
-        if respCode == 0:
+        if resp_code == 0:
             content_len = int(self.headers.getheader('content-length', 0))
             post_body = self.rfile.read(content_len)
             
@@ -123,21 +130,21 @@
             if indx != 0:
                 post_body = post_body[indx:]
             
-            if enqueEvent(post_body) == False:
+            if not enque_event(post_body):
                 print "enque event fails"
                    
             global EvtSchema
             try:
-                if EvtSchema == None:
-                    with open(DcaeVariables.CommonEventSchemaV5) as file:
-                        EvtSchema = json.load(file)
+                if EvtSchema is None:
+                    with open(DcaeVariables.CommonEventSchemaV5) as opened_file:
+                        EvtSchema = json.load(opened_file)
                 decoded_body = json.loads(post_body)
                 jsonschema.validate(decoded_body, EvtSchema)
             except:
-                respCode = 400
+                resp_code = 400
         
         # Begin the response
-        if DcaeVariables.IsRobotRun == False:
+        if not DcaeVariables.IsRobotRun:
             print ("Response Message:")
         
         '''
@@ -154,18 +161,18 @@
 
         '''
         
-        if respCode == 0:
+        if resp_code == 0:
             if 'clientThrottlingState' in self.requestline:
                 self.send_response(204)
             else:
                 self.send_response(200)
                 self.send_header('Content-Type', 'application/json')
                 self.end_headers()
-                #self.wfile.write("{'responses' : {'200' : {'description' : 'Success'}}}")
+                # self.wfile.write("{'responses' : {'200' : {'description' : 'Success'}}}")
                 self.wfile.write("{'count': 1, 'serverTimeMs': 3}")
                 self.wfile.close()
         else:
-            self.send_response(respCode)
+            self.send_response(resp_code)
         
         '''
         self.end_headers()
@@ -190,8 +197,7 @@
                 self.wfile.write('\t%s=%s\n' % (field, form[field].value))
         '''
         return
-    
-    
+
     def do_GET(self):
         """Serve a GET request."""
         f = self.send_head()
@@ -219,7 +225,6 @@
 
         """
         path = self.translate_path(self.path)
-        f = None
         if os.path.isdir(path):
             parts = urlparse.urlsplit(self.path)
             if not parts.path.endswith('/'):
@@ -268,18 +273,18 @@
 
         """
         try:
-            list = os.listdir(path)
+            list_dir = os.listdir(path)
         except os.error:
             self.send_error(404, "No permission to list directory")
             return None
-        list.sort(key=lambda a: a.lower())
+        list_dir.sort(key=lambda a: a.lower())
         f = StringIO()
         displaypath = cgi.escape(urllib.unquote(self.path))
         f.write('<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">')
         f.write("<html>\n<title>Directory listing for %s</title>\n" % displaypath)
         f.write("<body>\n<h2>Directory listing for %s</h2>\n" % displaypath)
         f.write("<hr>\n<ul>\n")
-        for name in list:
+        for name in list_dir:
             fullname = os.path.join(path, name)
             displayname = linkname = name
             # Append / for directories or @ for symbolic links
@@ -301,7 +306,8 @@
         self.end_headers()
         return f
 
-    def translate_path(self, path):
+    @staticmethod
+    def translate_path(path):
         """Translate a /-separated PATH to the local filename syntax.
 
         Components that mean special things to the local file system
@@ -310,8 +316,8 @@
 
         """
         # abandon query parameters
-        path = path.split('?',1)[0]
-        path = path.split('#',1)[0]
+        path = path.split('?', 1)[0]
+        path = path.split('#', 1)[0]
         # Don't forget explicit trailing slash when normalizing. Issue17324
         trailing_slash = path.rstrip().endswith('/')
         path = posixpath.normpath(urllib.unquote(path))
@@ -327,7 +333,8 @@
             path += '/'
         return path
 
-    def copyfile(self, source, outputfile):
+    @staticmethod
+    def copyfile(source, outputfile):
         """Copy all data between two file objects.
 
         The SOURCE argument is a file object open for reading
@@ -368,26 +375,26 @@
             return self.extensions_map['']
 
     if not mimetypes.inited:
-        mimetypes.init() # try to read system mime.types
+        mimetypes.init()  # try to read system mime.types
     extensions_map = mimetypes.types_map.copy()
     extensions_map.update({
-        '': 'application/octet-stream', # Default
+        '': 'application/octet-stream',  # Default
         '.py': 'text/plain',
         '.c': 'text/plain',
         '.h': 'text/plain',
         })
 
-def test(HandlerClass = DMaaPHandler,
-         ServerClass = BaseHTTPServer.HTTPServer, protocol="HTTP/1.0", port=3904):
+
+def test(handler_class=DMaaPHandler, server_class=BaseHTTPServer.HTTPServer, protocol="HTTP/1.0", port=3904):
     print "Load event schema file: " + DcaeVariables.CommonEventSchemaV5
-    with open(DcaeVariables.CommonEventSchemaV5) as file:
+    with open(DcaeVariables.CommonEventSchemaV5) as opened_file:
         global EvtSchema
-        EvtSchema = json.load(file)
+        EvtSchema = json.load(opened_file)
         
     server_address = ('', port)
 
-    HandlerClass.protocol_version = protocol
-    httpd = ServerClass(server_address, HandlerClass)
+    handler_class.protocol_version = protocol
+    httpd = server_class(server_address, handler_class)
     
     global DMaaPHttpd
     DMaaPHttpd = httpd
@@ -395,10 +402,10 @@
 
     sa = httpd.socket.getsockname()
     print "Serving HTTP on", sa[0], "port", sa[1], "..."
-    #httpd.serve_forever()
+    # httpd.serve_forever()
 
-def _main_ (HandlerClass = DMaaPHandler,
-         ServerClass = BaseHTTPServer.HTTPServer, protocol="HTTP/1.0"):
+
+def _main_(handler_class=DMaaPHandler, server_class=BaseHTTPServer.HTTPServer, protocol="HTTP/1.0"):
     
     if sys.argv[1:]:
         port = int(sys.argv[1])
@@ -406,18 +413,19 @@
         port = 3904
     
     print "Load event schema file: " + DcaeVariables.CommonEventSchemaV5
-    with open(DcaeVariables.CommonEventSchemaV5) as file:
+    with open(DcaeVariables.CommonEventSchemaV5) as opened_file:
         global EvtSchema
-        EvtSchema = json.load(file)
+        EvtSchema = json.load(opened_file)
         
     server_address = ('', port)
 
-    HandlerClass.protocol_version = protocol
-    httpd = ServerClass(server_address, HandlerClass)
+    handler_class.protocol_version = protocol
+    httpd = server_class(server_address, handler_class)
 
     sa = httpd.socket.getsockname()
     print "Serving HTTP on", sa[0], "port", sa[1], "..."
     httpd.serve_forever()
-    
+
+
 if __name__ == '__main__':
-    _main_()
\ No newline at end of file
+    _main_()
diff --git a/test/csit/tests/dcaegen2/testcases/resources/DcaeLibrary.py b/test/csit/tests/dcaegen2/testcases/resources/DcaeLibrary.py
index e581f1b..b43ee29 100644
--- a/test/csit/tests/dcaegen2/testcases/resources/DcaeLibrary.py
+++ b/test/csit/tests/dcaegen2/testcases/resources/DcaeLibrary.py
@@ -5,24 +5,34 @@
 '''
 from robot.api import logger
 from Queue import Queue
-import uuid, time, datetime,json, threading,os, platform, subprocess,paramiko
+import uuid
+import time
+import datetime
+import json
+import threading
+import os
+import platform
+import subprocess
+import paramiko
 import DcaeVariables
 import DMaaP
 
+
 class DcaeLibrary(object):
     
     def __init__(self):
         pass 
     
-    def setup_dmaap_server(self, portNum=3904):
-        if DcaeVariables.HttpServerThread != None:
-            DMaaP.cleanUpEvent()
+    @staticmethod
+    def setup_dmaap_server(port_num=3904):
+        if DcaeVariables.HttpServerThread is not None:
+            DMaaP.clean_up_event()
             logger.console("Clean up event from event queue before test")
             logger.info("DMaaP Server already started")
             return "true"
         
         DcaeVariables.IsRobotRun = True
-        DMaaP.test(port=portNum)
+        DMaaP.test(port=port_num)
         try:
             DcaeVariables.VESEventQ = Queue()
             DcaeVariables.HttpServerThread = threading.Thread(name='DMAAP_HTTPServer', target=DMaaP.DMaaPHttpd.serve_forever)
@@ -34,8 +44,9 @@
             print (str(e))
             return "false"
             
-    def shutdown_dmaap(self):
-        if DcaeVariables.HTTPD != None:
+    @staticmethod
+    def shutdown_dmaap():
+        if DcaeVariables.HTTPD is not None:
             DcaeVariables.HTTPD.shutdown()
             logger.console("DMaaP Server shut down")
             time.sleep(3)
@@ -43,20 +54,23 @@
         else:
             return "false"
             
-    def cleanup_ves_events(self):
-        if DcaeVariables.HttpServerThread != None:
-            DMaaP.cleanUpEvent()
+    @staticmethod
+    def cleanup_ves_events():
+        if DcaeVariables.HttpServerThread is not None:
+            DMaaP.clean_up_event()
             logger.console("DMaaP event queue is cleaned up")
             return "true"
         logger.console("DMaaP server not started yet")
         return "false"
     
-    def enable_vesc_https_auth(self):
+    @staticmethod
+    def enable_vesc_https_auth():
+        global client
         if 'Windows' in platform.system():
             try:
                 client = paramiko.SSHClient()
                 client.load_system_host_keys()
-                #client.set_missing_host_key_policy(paramiko.WarningPolicy)
+                # client.set_missing_host_key_policy(paramiko.WarningPolicy)
                 client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
                 
                 client.connect(os.environ['CSIT_IP'], port=22, username=os.environ['CSIT_USER'], password=os.environ['CSIT_PD'])
@@ -73,42 +87,42 @@
         time.sleep(5)
         return  
                    
-    def dmaap_message_receive(self, evtobj, action='contain'):
+    @staticmethod
+    def dmaap_message_receive(evtobj, action='contain'):
         
-        evtStr = DMaaP.dequeEvent()
-        while evtStr != None:
-            logger.console("DMaaP receive VES Event:\n" + evtStr)
+        evt_str = DMaaP.deque_event()
+        while evt_str != None:
+            logger.console("DMaaP receive VES Event:\n" + evt_str)
             if action == 'contain':
-                if evtobj in evtStr:
-                    logger.info("DMaaP Receive Expected Publish Event:\n" + evtStr)
+                if evtobj in evt_str:
+                    logger.info("DMaaP Receive Expected Publish Event:\n" + evt_str)
                     return 'true'
             if action == 'sizematch':
-                if len(evtobj) == len(evtStr):
+                if len(evtobj) == len(evt_str):
                     return 'true'
             if action == 'dictmatch':
-                evtDict = json.loads(evtStr)
-                if cmp(evtobj, evtDict) == 0:
+                evt_dict = json.loads(evt_str)
+                if cmp(evtobj, evt_dict) == 0:
                     return 'true'
-            evtStr = DMaaP.dequeEvent()
+            evt_str = DMaaP.deque_event()
         return 'false'
-    
-    def create_header_from_string(self, dictStr):
-        logger.info("Enter create_header_from_string: dictStr")
-        return dict(u.split("=") for u in dictStr.split(","))
-    
-    def is_json_empty(self, resp):
+
+    @staticmethod
+    def is_json_empty(resp):
         logger.info("Enter is_json_empty: resp.text: " + resp.text)
-        if resp.text == None or len(resp.text) < 2:
+        if resp.text is None or len(resp.text) < 2:
             return 'True'
         return 'False'
     
-    def Generate_UUID(self):
+    @staticmethod
+    def generate_uuid():
         """generate a uuid"""
         return uuid.uuid4()
     
-    def get_json_value_list(self, jsonstr, keyval):
+    @staticmethod
+    def get_json_value_list(jsonstr, keyval):
         logger.info("Enter Get_Json_Key_Value_List")
-        if jsonstr == None or len(jsonstr) < 2:
+        if jsonstr is None or len(jsonstr) < 2:
             logger.info("No Json data found")
             return []
         try:
@@ -122,12 +136,14 @@
             print str(e)
             return []
         
-    def generate_MilliTimestamp_UUID(self):
+    @staticmethod
+    def generate_millitimestamp_uuid():
         """generate a millisecond timestamp uuid"""
         then = datetime.datetime.now()
         return int(time.mktime(then.timetuple())*1e3 + then.microsecond/1e3)
     
-    def test (self):
+    @staticmethod
+    def test():
         import json
         from pprint import pprint
 
@@ -138,7 +154,6 @@
         pprint(data)
 
 
-
 if __name__ == '__main__':
     '''
     dictStr = "action=getTable,Accept=application/json,Content-Type=application/json,X-FromAppId=1234908903284"
@@ -156,4 +171,3 @@
     ret = lib.setup_dmaap_server()
     print ret
     time.sleep(100000)
-    
diff --git a/test/csit/tests/dcaegen2/testcases/resources/DcaeVariables.py b/test/csit/tests/dcaegen2/testcases/resources/DcaeVariables.py
index 4d51a8f..a9456d0 100644
--- a/test/csit/tests/dcaegen2/testcases/resources/DcaeVariables.py
+++ b/test/csit/tests/dcaegen2/testcases/resources/DcaeVariables.py
@@ -1,13 +1,14 @@
+import os
 
-import os, time
 
-def GetEnvironmentVariable(envVarstr):
-    return os.environ.get(envVarstr)
+def get_environment_variable(env_varstr):
+    return os.environ.get(env_varstr)
+
 
 DCAE_HEALTH_CHECK_URL = "http://135.205.228.129:8500"
 DCAE_HEALTH_CHECK_URL1 = "http://135.205.228.170:8500"
 
-CommonEventSchemaV5  = GetEnvironmentVariable('WORKSPACE') + "/test/csit/tests/dcaegen2/testcases/assets/json_events/CommonEventFormat_28.3.json"
+CommonEventSchemaV5 = get_environment_variable('WORKSPACE') + "/test/csit/tests/dcaegen2/testcases/assets/json_events/CommonEventFormat_28.3.json"
 
 HttpServerThread = None
 HTTPD = None
diff --git a/test/csit/tests/dcaegen2/testcases/resources/dcae_keywords.robot b/test/csit/tests/dcaegen2/testcases/resources/dcae_keywords.robot
index 98b3415..6820050 100644
--- a/test/csit/tests/dcaegen2/testcases/resources/dcae_keywords.robot
+++ b/test/csit/tests/dcaegen2/testcases/resources/dcae_keywords.robot
@@ -1,4 +1,4 @@
- *** Settings ***
+*** Settings ***
 Documentation     The main interface for interacting with DCAE. It handles low level stuff like managing the http request library and DCAE required fields
 Library 	      RequestsLibrary
 Library	          DcaeLibrary   
@@ -6,9 +6,23 @@
 Library           Collections
 Variables         ../resources/DcaeVariables.py
 Resource          ../resources/dcae_properties.robot
+
 *** Variables ***
 ${DCAE_HEALTH_CHECK_BODY}    %{WORKSPACE}/test/csit/tests/dcae/testcases/assets/json_events/dcae_healthcheck.json
+
 *** Keywords ***
+Create sessions
+    [Documentation]  Create all required sessions
+    Create Session    dcae_vesc_url    ${VESC_URL}
+    Set Suite Variable    ${suite_dcae_vesc_url_session}    dcae_vesc_url
+    ${auth}=  Create List  ${VESC_HTTPS_USER}   ${VESC_HTTPS_PD}
+    Create Session    dcae_vesc_url_https    ${VESC_URL_HTTPS}  auth=${auth}  disable_warnings=1
+    Set Suite Variable    ${suite_dcae_vesc_url_https_session}    dcae_vesc_url_https
+
+Create header
+    ${headers}=    Create Dictionary    Content-Type=application/json
+    Set Suite Variable    ${suite_headers}    ${headers}
+
 Get DCAE Nodes
     [Documentation]    Get DCAE Nodes from Consul Catalog
     #Log    Creating session   ${GLOBAL_DCAE_CONSUL_URL}
@@ -22,7 +36,8 @@
     ${NodeListLength}=  Get Length  ${NodeList}  
     ${len}=  Get Length   ${NodeList}   
     Should Not Be Equal As Integers   ${len}   0
-    [return]    ${NodeList}
+    [Return]    ${NodeList}
+
 DCAE Node Health Check
     [Documentation]    Perform DCAE Node Health Check
     [Arguments]    ${NodeName}
@@ -38,18 +53,22 @@
     Should Not Be Equal As Integers   ${len}   0
     DCAE Check Health Status    ${NodeName}   ${StatusList[0]}    Serf Health Status
     #Run Keyword if  ${len} > 1  DCAE Check Health Status  ${NodeName}  ${StatusList[1]}  Serf Health Status
+
 DCAE Check Health Status
     [Arguments]    ${NodeName}    ${ItemStatus}   ${CheckType}
     Should Be Equal As Strings    ${ItemStatus}    passing   
     Log   Node: ${NodeName} ${CheckType} check pass ok
+
 VES Collector Suite Setup DMaaP
     [Documentation]   Start DMaaP Mockup Server
     ${ret}=  Setup DMaaP Server
     Should Be Equal As Strings     ${ret}    true
+
 VES Collector Suite Shutdown DMaaP
     [Documentation]   Shutdown DMaaP Mockup Server
     ${ret}=  Shutdown DMaap
     Should Be Equal As Strings     ${ret}    true
+
 Check DCAE Results
     [Documentation]    Parse DCAE JSON response and make sure all rows have healthTestStatus=GREEN
     [Arguments]    ${json}
@@ -65,6 +84,7 @@
     \    ${cells}=    Get From Dictionary    ${row}    cells
     \    ${dict}=    Make A Dictionary    ${cells}    ${columns}
     \    Dictionary Should Contain Item    ${dict}    healthTestStatus    GREEN
+
 Make A Dictionary
     [Documentation]    Given a list of column names and a list of dictionaries, map columname=value
     [Arguments]     ${columns}    ${names}    ${valuename}=value
@@ -77,57 +97,49 @@
     \    ${value}=    Get From Dictionary    ${valued}    ${valueName}
     \    Set To Dictionary    ${dict}   ${name}    ${value}     
     [Return]     ${dict}
-Get Event Data From File
-    [Arguments]    ${jsonfile}
-    ${data}=    OperatingSystem.Get File    ${jsonfile}
-    #Should Not Be_Equal    ${data}    None
-    [return]    ${data}
+
 Json String To Dictionary
     [Arguments]  ${json_string}   
     ${json_dict}=  evaluate    json.loads('''${json_string}''')    json
-    [return]   ${json_dict}
+    [Return]   ${json_dict}
+
 Dictionary To Json String
     [Arguments]  ${json_dict}
     ${json_string}=    evaluate    json.dumps(${json_dict})    json
-    [return]    ${json_string}
+    [Return]    ${json_string}
+
 Get DCAE Service Component Status
     [Documentation]   Get the status of a DCAE Service Component
     [Arguments]    ${url}    ${urlpath}     ${usr}    ${passwd}    
     ${auth}=  Create List  ${usr}  ${passwd}
     ${session}=    Create Session 	dcae-service-component 	${url}    auth=${auth}
     ${resp}= 	Get Request 	dcae-service-component 	${urlpath}
-    [return]    ${resp}
+    [Return]    ${resp}
+
 Publish Event To VES Collector No Auth
     [Documentation]    Send an event to VES Collector
-    [Arguments]     ${url}  ${evtpath}   ${httpheaders}    ${evtdata}
-    Log    Creating session ${url}
-    ${session}=    Create Session 	dcaegen2-d1 	${url}
-    ${resp}= 	Post Request 	dcaegen2-d1 	${evtpath}     data=${evtdata}   headers=${httpheaders}
+    [Arguments]     ${evtpath}   ${evtdata}
+    ${resp}= 	Post Request 	${suite_dcae_vesc_url_session} 	${evtpath}     data=${evtdata}   headers=${suite_headers}
     #Log    Received response from dcae ${resp.json()}
-    [return] 	${resp}
+    [Return] 	${resp}
+
 Publish Event To VES Collector
     [Documentation]    Send an event to VES Collector
-    [Arguments]     ${url}  ${evtpath}   ${httpheaders}    ${evtdata}   ${user}  ${pd}
-    ${auth}=  Create List  ${user}   ${pd}
-    Log    Creating session ${url}
-    ${session}=    Create Session 	dcaegen2-d1 	${url}    auth=${auth}   disable_warnings=1
-    ${resp}= 	Post Request 	dcaegen2-d1 	${evtpath}     data=${evtdata}   headers=${httpheaders}
+    [Arguments]     ${evtpath}   ${evtdata}
+    ${resp}= 	Post Request 	${suite_dcae_vesc_url_https_session}  	${evtpath}     data=${evtdata}   headers=${suite_headers}
     #Log    Received response from dcae ${resp.json()}
-    [return] 	${resp}
+    [Return] 	${resp}
+
 Publish Event To VES Collector With Put Method
     [Documentation]    Send an event to VES Collector
-    [Arguments]     ${url}  ${evtpath}   ${httpheaders}    ${evtdata}   ${user}  ${pd}
-    ${auth}=  Create List  ${user}   ${pd}
-    Log    Creating session ${url}
-    ${session}=    Create Session 	dcae-d1 	${url}    auth=${auth}
-    ${resp}= 	Put Request 	dcae-d1 	${evtpath}     data=${evtdata}   headers=${httpheaders}
+    [Arguments]     ${evtpath}   ${evtdata}
+    ${resp}= 	Put Request 	${suite_dcae_vesc_url_https_session}  	${evtpath}     data=${evtdata}   headers=${suite_headers}
     #Log    Received response from dcae ${resp.json()}
-    [return] 	${resp}
+    [Return] 	${resp}
+
 Publish Event To VES Collector With Put Method No Auth
     [Documentation]    Send an event to VES Collector
-    [Arguments]     ${url}  ${evtpath}   ${httpheaders}    ${evtdata}
-    Log    Creating session ${url}
-    ${session}=    Create Session 	dcae-d1 	${url}
-    ${resp}= 	Put Request 	dcae-d1 	${evtpath}     data=${evtdata}   headers=${httpheaders}
+    [Arguments]     ${evtpath}   ${evtdata}
+    ${resp}= 	Put Request 	${suite_dcae_vesc_url_session} 	${evtpath}     data=${evtdata}   headers=${suite_headers}
     #Log    Received response from dcae ${resp.json()}
-    [return] 	${resp}
+    [Return] 	${resp}
diff --git a/test/csit/tests/dcaegen2/testcases/resources/dcae_properties.robot b/test/csit/tests/dcaegen2/testcases/resources/dcae_properties.robot
index 6924888..135ff26 100644
--- a/test/csit/tests/dcaegen2/testcases/resources/dcae_properties.robot
+++ b/test/csit/tests/dcaegen2/testcases/resources/dcae_properties.robot
@@ -1,9 +1,8 @@
+*** Settings ***
 Documentation        store all properties that can change or are used in multiple places here
 ...                    format is all caps with underscores between words and prepended with GLOBAL
 ...                   make sure you prepend them with GLOBAL so that other files can easily see it is from this file.
 
-
-
 *** Variables ***
 ${GLOBAL_APPLICATION_ID}           robot-dcaegen2
 ${GLOBAL_DCAE_CONSUL_URL}          http://135.205.228.129:8500