VPP-1508: Use scapy.compat to manage packet level library differences.

Change-Id: Icdf6abc9e53d33b26fd1d531c7dda6be0bb9cb55
Signed-off-by: Paul Vinciguerra <pvinci@vinciconsulting.com>
diff --git a/test/test_acl_plugin_l2l3.py b/test/test_acl_plugin_l2l3.py
index 73dd473..2a99e86 100644
--- a/test/test_acl_plugin_l2l3.py
+++ b/test/test_acl_plugin_l2l3.py
@@ -28,6 +28,7 @@
 from random import choice, shuffle
 from pprint import pprint
 
+import scapy.compat
 from scapy.packet import Raw
 from scapy.layers.l2 import Ether
 from scapy.layers.inet import IP, UDP, ICMP, TCP
@@ -308,12 +309,14 @@
             # Scapy IPv6 stuff is too smart for its own good.
             # So we do this and coerce the ICMP into unknown type
             if packet.haslayer(UDP):
-                data = str(packet[UDP][Raw])
+                data = scapy.compat.raw(packet[UDP][Raw])
             else:
                 if l3 == IP:
-                    data = str(ICMP(str(packet[l3].payload))[Raw])
+                    data = scapy.compat.raw(ICMP(
+                        scapy.compat.raw(packet[l3].payload))[Raw])
                 else:
-                    data = str(ICMPv6Unknown(str(packet[l3].payload)).msgbody)
+                    data = scapy.compat.raw(ICMPv6Unknown(
+                        scapy.compat.raw(packet[l3].payload)).msgbody)
             udp_or_icmp = packet[l3].payload
             payload_info = self.payload_to_info(data)
             packet_index = payload_info.index