Fixed javadoc warnings and some cleanups

- Fixed javadoc warnings
- Removed commented code lines
- Removed OpenstackNetworkingConfig and SubjectFactories class which is no longer used
- Fixed scalablegateway app artifact ID
- Use PORT_NAME defined in net.AnnotationKeys

Change-Id: Id18501addefa12655e4946b9931ec094a34ee83c
diff --git a/apps/openstacknetworking/api/src/main/java/org/onosproject/openstacknetworking/OpenstackRoutingService.java b/apps/openstacknetworking/api/src/main/java/org/onosproject/openstacknetworking/OpenstackRoutingService.java
index 6b04bfe..327d9e4 100644
--- a/apps/openstacknetworking/api/src/main/java/org/onosproject/openstacknetworking/OpenstackRoutingService.java
+++ b/apps/openstacknetworking/api/src/main/java/org/onosproject/openstacknetworking/OpenstackRoutingService.java
@@ -81,17 +81,10 @@
     void removeRouterInterface(OpenstackRouterInterface openstackRouterInterface);
 
     /**
-     * Checks floatingIp disassociation when corresponding deleted vm.
-     *
-     * @param portId Deleted vm
-     * @param portInfo stored information about deleted vm
-    void checkDisassociatedFloatingIp(String portId, OpenstackPortInfo portInfo);
-    */
-
-    /**
      * Returns network id for routerInterface.
      *
      * @param portId routerInterface`s port id
+     * @return network id
      */
     String networkIdForRouterInterface(String portId);
 }