Use packets.py instead of old multinetwork_test.Packets

Change-Id: I39a36569a2df5b2a2a5b2bb323944864b284df0a
diff --git a/net/test/srcaddr_selection_test.py b/net/test/srcaddr_selection_test.py
index 8145295..d3efdd9 100755
--- a/net/test/srcaddr_selection_test.py
+++ b/net/test/srcaddr_selection_test.py
@@ -25,7 +25,7 @@
 import csocket
 import iproute
 import multinetwork_base
-import multinetwork_test
+import packets
 import net_test
 
 # Setsockopt values.
@@ -311,7 +311,7 @@
     if net_test.LinuxVersion() >= (3, 18, 0):
       # Older versions will actually choose the optimistic address to
       # originate Neighbor Solications (RFC violation).
-      expected_ns = multinetwork_test.Packets.NS(
+      expected_ns = packets.NS(
           self.test_lladdr,
           onlink_dest,
           self.MyMacAddress(self.test_netid))[1]