fix snitch_test.py::TestGossipingPropertyFileSnitch::test_prefer_local_reconnect_on_listen_address

Patch by mck; reviewed by brandonwilliams for CASSANDRA-16381
diff --git a/snitch_test.py b/snitch_test.py
index c6d5028..5b640c8 100644
--- a/snitch_test.py
+++ b/snitch_test.py
@@ -129,10 +129,24 @@
         assert "/{}".format(NODE1_BROADCAST_ADDRESS) in out
         assert "INTERNAL_IP:{}:{}".format('9' if running40 else '6', NODE1_LISTEN_ADDRESS) in out
         assert "/{}".format(NODE2_BROADCAST_ADDRESS) in out
-        assert "INTERNAL_IP:{}:{}".format('9' if running40 else '6', NODE2_LISTEN_ADDRESS) in out
         if running40:
             assert "INTERNAL_ADDRESS_AND_PORT:7:{}".format(NODE1_40_LISTEN_ADDRESS) in out
             assert "INTERNAL_ADDRESS_AND_PORT:7:{}".format(NODE2_40_LISTEN_ADDRESS) in out
+        else:
+            assert "INTERNAL_IP:{}:{}".format('6', NODE2_LISTEN_ADDRESS) in out
+
+        out, err, _ = node2.nodetool('gossipinfo')
+        assert_stderr_clean(err)
+        logger.debug(out)
+
+        assert "/{}".format(NODE1_BROADCAST_ADDRESS) in out
+        assert "INTERNAL_IP:{}:{}".format('9' if running40 else '6', NODE2_LISTEN_ADDRESS) in out
+        assert "/{}".format(NODE2_BROADCAST_ADDRESS) in out
+        if running40:
+            assert "INTERNAL_ADDRESS_AND_PORT:7:{}".format(NODE1_40_LISTEN_ADDRESS) in out
+            assert "INTERNAL_ADDRESS_AND_PORT:7:{}".format(NODE2_40_LISTEN_ADDRESS) in out
+        else:
+            assert "INTERNAL_IP:{}:{}".format('6', NODE1_LISTEN_ADDRESS) in out
 
 class TestDynamicEndpointSnitch(Tester):
     @pytest.mark.resource_intensive