Deprecating old web-socket stuff and adding ability for client-side message handler registration. Failover still to be done and same for the async hooks.

Change-Id: I6029c91eb1a04e01401e495b9673ddaea728e215
diff --git a/web/gui/src/main/java/org/onosproject/ui/impl/TopologyViewMessages.java b/web/gui/src/main/java/org/onosproject/ui/impl/TopologyViewMessages.java
index dd891cd..b9b50ca 100644
--- a/web/gui/src/main/java/org/onosproject/ui/impl/TopologyViewMessages.java
+++ b/web/gui/src/main/java/org/onosproject/ui/impl/TopologyViewMessages.java
@@ -98,6 +98,7 @@
 /**
  * Facility for creating messages bound for the topology viewer.
  */
+@Deprecated
 public abstract class TopologyViewMessages {
 
     protected static final Logger log = LoggerFactory.getLogger(TopologyViewMessages.class);