Fix: do not handle instance port on receiving router interface events

Change-Id: I820efc40a4190cbf5b5d1db3db56dd7c6e63f8e1
diff --git a/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/impl/OpenstackRoutingSnatHandler.java b/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/impl/OpenstackRoutingSnatHandler.java
index d74e276..2a91d76 100644
--- a/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/impl/OpenstackRoutingSnatHandler.java
+++ b/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/impl/OpenstackRoutingSnatHandler.java
@@ -112,7 +112,6 @@
 import static org.onosproject.openstacknetworking.api.Constants.PRIORITY_SNAT_RULE;
 import static org.onosproject.openstacknetworking.api.Constants.PRIORITY_STATEFUL_SNAT_RULE;
 import static org.onosproject.openstacknetworking.api.Constants.ROUTING_TABLE;
-import static org.onosproject.openstacknetworking.api.InstancePort.State.ACTIVE;
 import static org.onosproject.openstacknetworking.api.OpenstackNetwork.Type.FLAT;
 import static org.onosproject.openstacknetworking.api.OpenstackNetwork.Type.VLAN;
 import static org.onosproject.openstacknetworking.impl.OsgiPropertyConstants.USE_STATEFUL_SNAT;
@@ -839,11 +838,6 @@
                 ImmutableList.copyOf(osNodeService.nodes(GATEWAY)));
 
         osNodeService.completeNodes(GATEWAY).forEach(gwNode -> {
-            instancePortService.instancePorts(netId)
-                    .stream()
-                    .filter(port -> port.state() == ACTIVE)
-                    .forEach(port -> setGatewayToInstanceDownstreamRule(
-                            gwNode, port, install));
             if (install) {
                 PortRange gwPortRange = gwPortRangeMap.get(gwNode);