Update healthcheck-k8s script synopsis in vCPE manual

This reflects changes made in regard of input parameters
done in Change-Id: Ib6e2875f351f095bd64acd706a6060e169c54e79

Also contains minor fix for 'namespace' and 'environment' vars
usage which are unused otherwise.

Change-Id: Ie479400dfa0d61c89a256d4aafb2c2d184f9b935
Signed-off-by: Bartek Grzybowski <b.grzybowski@partner.samsung.com>
Issue-ID: INT-1213
diff --git a/test/vcpe/healthcheck-k8s.py b/test/vcpe/healthcheck-k8s.py
index d161285..4583241 100755
--- a/test/vcpe/healthcheck-k8s.py
+++ b/test/vcpe/healthcheck-k8s.py
@@ -12,7 +12,7 @@
     Parse command line arguments
     :return: arguments
     """
-    parser = argparse.ArgumentParser(description='Processing arguments for vCPE healthcheck')
+    parser = argparse.ArgumentParser(description='Processing arguments for vCPE healthcheck',formatter_class=argparse.ArgumentDefaultsHelpFormatter)
     parser.add_argument('--namespace', default="onap",
                              metavar=('<namespace_name>'),
                              help='Namespace name for existing ONAP deployment')
@@ -30,21 +30,20 @@
 
 print('Checking vGMUX REST API from SDNC')
 cmd = 'curl -s -u admin:admin -X GET http://10.0.101.21:8183/restconf/config/ietf-interfaces:interfaces'
-ret = commands.getstatusoutput("kubectl -n {0} exec {1}-sdnc-sdnc-0 -- bash -c '{2}'".format(args.namespace, args.environment, cmd))
+ret = commands.getstatusoutput("kubectl -n {0} exec {1}-sdnc-sdnc-0 -- bash -c '{2}'".format(namespace, environment, cmd))
 sz = ret[-1].split('\n')[-1]
 print(json.dumps(json.loads(sz), indent=4))
 
 print('\n')
 print('Checking vBRG REST API from SDNC')
 cmd = 'curl -s -u admin:admin -X GET http://10.3.0.2:8183/restconf/config/ietf-interfaces:interfaces'
-ret = commands.getstatusoutput("kubectl -n {0} exec {1}-sdnc-sdnc-0 -- bash -c '{2}'".format(args.namespace, args.environment, cmd))
+ret = commands.getstatusoutput("kubectl -n {0} exec {1}-sdnc-sdnc-0 -- bash -c '{2}'".format(namespace, environment, cmd))
 sz = ret[-1].split('\n')[-1]
 print(json.dumps(json.loads(sz), indent=4))
 
 print('\n')
 print('Checking SDNC DB for vBRG MAC address')
-cmd = "kubectl -n {0} exec {1}-mariadb-galera-mariadb-galera-0 -- mysql -uroot -psecretpassword sdnctl -e 'select * from DHCP_MAP'".format(args.namespace, args.environment)
+cmd = "kubectl -n {0} exec {1}-mariadb-galera-mariadb-galera-0 -- mysql -uroot -psecretpassword sdnctl -e 'select * from DHCP_MAP'".format(namespace, environment)
 p = subprocess.Popen(cmd, stdout=subprocess.PIPE, shell=True)
 (output, error) = p.communicate()
 print(output)
-