Initial implementation of SNAT functionality.

Change-Id: I9094755c6d25a62e527976b9bf275d7c1e2a3f86
diff --git a/apps/kubevirt-networking/app/src/test/resources/org/onosproject/kubevirtnetworking/codec/KubevirtRouter.json b/apps/kubevirt-networking/app/src/test/resources/org/onosproject/kubevirtnetworking/codec/KubevirtRouter.json
index 44fd556..14e60ec 100644
--- a/apps/kubevirt-networking/app/src/test/resources/org/onosproject/kubevirtnetworking/codec/KubevirtRouter.json
+++ b/apps/kubevirt-networking/app/src/test/resources/org/onosproject/kubevirtnetworking/codec/KubevirtRouter.json
@@ -12,5 +12,6 @@
   ],
   "peerRouter": {
     "ip": "192.168.10.1"
-  }
+  },
+  "gateway": "gatewayNode"
 }
\ No newline at end of file