Revert "Revert "make test: fix broken interfaces""

This reverts commit c8efa29b6f9a91381897b54f1147daf922ed7164.

Change-Id: I1d5c5773d5f86a63073e255336bd9de628e26179
Signed-off-by: Klement Sekera <ksekera@cisco.com>
diff --git a/test/test_udp.py b/test/test_udp.py
index aabbbd3..230335f 100644
--- a/test/test_udp.py
+++ b/test/test_udp.py
@@ -1,11 +1,11 @@
 #!/usr/bin/env python
-
+import unittest
 from framework import VppTestCase, VppTestRunner
-from vpp_udp_encap import *
+from vpp_udp_encap import VppUdpEncap
 from vpp_ip_route import VppIpRoute, VppRoutePath, VppIpTable, VppMplsLabel
 
 from scapy.packet import Raw
-from scapy.layers.l2 import Ether, ARP
+from scapy.layers.l2 import Ether
 from scapy.layers.inet import IP, UDP
 from scapy.layers.inet6 import IPv6
 from scapy.contrib.mpls import MPLS
@@ -233,7 +233,7 @@
     def setUp(self):
         super(TestUDP, self).setUp()
         self.vapi.session_enable_disable(is_enabled=1)
-        self.create_loopback_interfaces(range(2))
+        self.create_loopback_interfaces(2)
 
         table_id = 0