[ONOS-4478][ONOS-4479] Implement scalable gateway get methods and gateway node management

 - Implements scalable gateway interface methods
 - Implements gateway node management

Change-Id: Ie5eb400b52df49dc36aef951e356e04b6238d59d
diff --git a/apps/scalablegateway/pom.xml b/apps/scalablegateway/pom.xml
index 8124baf..a3da966 100644
--- a/apps/scalablegateway/pom.xml
+++ b/apps/scalablegateway/pom.xml
@@ -47,6 +47,12 @@
         <dependency>
             <groupId>org.onosproject</groupId>
             <artifactId>onos-api</artifactId>
+            <version>${project.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.onosproject</groupId>
+            <artifactId>onos-core-serializers</artifactId>
+            <version>${project.version}</version>
         </dependency>
     </dependencies>
 </project>