[ONOS-3697] Remove flow rules and dhcp mapping for router when it is removed.

Change-Id: I24e7c6d3fa0731822250c84ac5807f6192d371bf
diff --git a/apps/openstackswitching/app/src/main/java/org/onosproject/openstackswitching/web/OpenstackPortWebResource.java b/apps/openstackswitching/app/src/main/java/org/onosproject/openstackswitching/web/OpenstackPortWebResource.java
index 261128d..4e23753 100644
--- a/apps/openstackswitching/app/src/main/java/org/onosproject/openstackswitching/web/OpenstackPortWebResource.java
+++ b/apps/openstackswitching/app/src/main/java/org/onosproject/openstackswitching/web/OpenstackPortWebResource.java
@@ -72,6 +72,9 @@
     @Path("{portUUID}")
     @DELETE
     public Response deletePorts(@PathParam("portUUID") String id) {
+        OpenstackSwitchingService switchingService =
+                getService(OpenstackSwitchingService.class);
+        switchingService.deletePort(id);
         return Response.status(Response.Status.OK).build();
     }