Regard the release when the APIs became deprecated as Cardinal

Change-Id: I072fa33a2a70baa7466d7a0dc5067191476be0f3
diff --git a/web/gui/src/main/java/org/onosproject/ui/impl/TopologyViewMessageHandlerBase.java b/web/gui/src/main/java/org/onosproject/ui/impl/TopologyViewMessageHandlerBase.java
index e78a9cd..336d6f2 100644
--- a/web/gui/src/main/java/org/onosproject/ui/impl/TopologyViewMessageHandlerBase.java
+++ b/web/gui/src/main/java/org/onosproject/ui/impl/TopologyViewMessageHandlerBase.java
@@ -109,6 +109,8 @@
 
 /**
  * Facility for creating messages bound for the topology viewer.
+ *
+ * @deprecated in Cardinal Release
  */
 @Deprecated
 public abstract class TopologyViewMessageHandlerBase extends UiMessageHandler {