[ONOS-4291] Implement skeleton of gateway load balancer

 - Implements scalable gateway service
 - Implements gateway node model

Change-Id: I3713c67edcff9b10ccb23a7ad3323f5c30c7d6a3
diff --git a/apps/pom.xml b/apps/pom.xml
index 501b4f0..b72a220 100644
--- a/apps/pom.xml
+++ b/apps/pom.xml
@@ -75,7 +75,9 @@
         <module>graphitemetrics</module>
         <module>xosclient</module>
         <module>cordconfig</module>
-  </modules>
+        <module>scalablegateway</module>
+    </modules>
+
 
     <properties>
         <web.context>default</web.context>