VPP-1508 python tests: unicode

Change unicode references to use text_type

Change-Id: Ia71c16e3235bc509abd3b1c651ae125f892ab108
Signed-off-by: Paul Vinciguerra <pvinci@vinciconsulting.com>
diff --git a/test/test_ip6.py b/test/test_ip6.py
index 6793c8b..6832498 100644
--- a/test/test_ip6.py
+++ b/test/test_ip6.py
@@ -30,6 +30,11 @@
 
 AF_INET6 = socket.AF_INET6
 
+try:
+    text_type = unicode
+except NameError:
+    text_type = str
+
 
 def mk_ll_addr(mac):
     euid = in6_mactoifaceid(mac)
@@ -1060,9 +1065,9 @@
 
     def verify_prefix_info(self, reported_prefix, prefix_option):
         prefix = IPv6Network(
-            unicode(prefix_option.getfieldval("prefix") +
-                    "/" +
-                    str(prefix_option.getfieldval("prefixlen"))),
+            text_type(prefix_option.getfieldval("prefix") +
+                      "/" +
+                      text_type(prefix_option.getfieldval("prefixlen"))),
             strict=False)
         self.assert_equal(reported_prefix.prefix.network_address,
                           prefix.network_address)
diff --git a/test/test_ip_ecmp.py b/test/test_ip_ecmp.py
index 60673ea..17b0a6c 100644
--- a/test/test_ip_ecmp.py
+++ b/test/test_ip_ecmp.py
@@ -5,6 +5,7 @@
 import socket
 from ipaddress import IPv4Address, IPv6Address, AddressValueError
 
+
 from framework import VppTestCase, VppTestRunner
 from util import ppp
 
@@ -13,6 +14,11 @@
 from scapy.layers.inet import IP, UDP
 from scapy.layers.inet6 import IPv6
 
+try:
+    text_type = unicode
+except NameError:
+    text_type = str
+
 #
 # The number of packets to sent.
 #
@@ -79,10 +85,10 @@
         :return: Random IPv4 or IPv6 address from required range.
         """
         try:
-            ip_addr = IPv4Address(unicode(ip_addr_start))
+            ip_addr = IPv4Address(text_type(ip_addr_start))
             ip_max_len = 32
         except (AttributeError, AddressValueError):
-            ip_addr = IPv6Address(unicode(ip_addr_start))
+            ip_addr = IPv6Address(text_type(ip_addr_start))
             ip_max_len = 128
 
         return str(ip_addr +
diff --git a/test/vpp_neighbor.py b/test/vpp_neighbor.py
index 7391447..b38aae8 100644
--- a/test/vpp_neighbor.py
+++ b/test/vpp_neighbor.py
@@ -7,10 +7,14 @@
 from ipaddress import ip_address
 from vpp_object import *
 from vpp_papi import mac_pton, VppEnum
+try:
+    text_type = unicode
+except NameError:
+    text_type = str
 
 
 def find_nbr(test, sw_if_index, nbr_addr, is_static=0, mac=None):
-    ip_addr = ip_address(unicode(nbr_addr))
+    ip_addr = ip_address(text_type(nbr_addr))
     e = VppEnum.vl_api_ip_neighbor_flags_t
     nbrs = test.vapi.ip_neighbor_dump(sw_if_index,
                                       is_ipv6=(6 is ip_addr.version))