add scapy imports to fix packet pretty-printing
diff --git a/src/python/oftest/packet.py b/src/python/oftest/packet.py
index 1b43091..9631e02 100644
--- a/src/python/oftest/packet.py
+++ b/src/python/oftest/packet.py
@@ -7,6 +7,9 @@
 import sys
 
 try:
+    import scapy.config
+    import scapy.route
+    import scapy.route6
     import scapy.layers.l2
     import scapy.layers.inet
     import scapy.layers.inet6