w.i.p.: nit in path query test filter function

Author: ngsrinivas

pyretic/tests/test_bucket.py

@@ -348,9 +348,9 @@ def filt_path_test_0(l):
     return pkt_interface('s2-eth3', l)
 
 def filt_path_test_0_5(l):
-    return (pkt_srcip(ip2, l) or pkt_dstip(ip2, l) or
-            (pkt_srcip(ip3, l) and pkt_dstip(ip1, l)) or
-            (pkt_srcip(ip1, l) and pkt_dstip(ip2, l)))
+    return (pkt_srcip(ip2, l) or
+            (pkt_srcip(ip1, l) and not pkt_interface('s1-eth2', l)) or
+            (pkt_srcip(ip3, l) and not pkt_interface('s3-eth2', l)))
 
 ### Interfaces map for packet capture ###
 def map_any():