Add missing dependency declaration

Change-Id: I02ea3acea29f13eee65caeee2dbb65551f256fb6
diff --git a/src/main/java/net/onrc/onos/ofcontroller/networkgraph/NetworkGraphModule.java b/src/main/java/net/onrc/onos/ofcontroller/networkgraph/NetworkGraphModule.java
index 6ae4777..7a6ef26 100644
--- a/src/main/java/net/onrc/onos/ofcontroller/networkgraph/NetworkGraphModule.java
+++ b/src/main/java/net/onrc/onos/ofcontroller/networkgraph/NetworkGraphModule.java
@@ -53,6 +53,7 @@
 				new ArrayList<Class<? extends IFloodlightService>>();
 		dependencies.add(IDatagridService.class);
 		dependencies.add(IRestApiService.class);
+		dependencies.add(IControllerRegistryService.class);
 		return dependencies;
 	}