[ONOS-4428] Fix the L3 dataflow bug when in same ternant but different
subnet with different routers, in the odler version of ONOS, in the same
ternant, different network with differnent routers, dataflows can be
send to each other successfully.

Change-Id: I6e50289023711eb0f6005efee0efd6f7ab9ec3ee
diff --git a/apps/vtn/sfcmgr/src/test/java/org/onosproject/sfc/util/VtnRscAdapter.java b/apps/vtn/sfcmgr/src/test/java/org/onosproject/sfc/util/VtnRscAdapter.java
index e5e2f1c..011d6a1 100644
--- a/apps/vtn/sfcmgr/src/test/java/org/onosproject/sfc/util/VtnRscAdapter.java
+++ b/apps/vtn/sfcmgr/src/test/java/org/onosproject/sfc/util/VtnRscAdapter.java
@@ -24,6 +24,7 @@
 import org.onosproject.net.HostId;
 import org.onosproject.vtnrsc.SegmentationId;
 import org.onosproject.vtnrsc.TenantId;
+import org.onosproject.vtnrsc.TenantRouter;
 import org.onosproject.vtnrsc.VirtualPortId;
 import org.onosproject.vtnrsc.event.VtnRscListener;
 import org.onosproject.vtnrsc.service.VtnRscService;
@@ -79,4 +80,9 @@
     public void removeDeviceIdOfOvsMap(Host host, TenantId tenantId,
                                        DeviceId deviceId) {
     }
+
+    @Override
+    public SegmentationId getL3vni(TenantRouter tenantRouter) {
+        return null;
+    }
 }