GUI -- Rename UIMessageHandlerTwo => UIMessageHandler. Also, make bindHandlers() private.

Change-Id: Id36e220c1285b88b8b4db0e106ef063bd8b9bfd1
diff --git a/web/gui/src/main/java/org/onosproject/ui/impl/FlowViewMessageHandler.java b/web/gui/src/main/java/org/onosproject/ui/impl/FlowViewMessageHandler.java
index 0ad1d70..dc9e898 100644
--- a/web/gui/src/main/java/org/onosproject/ui/impl/FlowViewMessageHandler.java
+++ b/web/gui/src/main/java/org/onosproject/ui/impl/FlowViewMessageHandler.java
@@ -27,7 +27,7 @@
 import org.onosproject.net.flow.criteria.Criterion;
 import org.onosproject.net.flow.instructions.Instruction;
 import org.onosproject.ui.RequestHandler;
-import org.onosproject.ui.UiMessageHandlerTwo;
+import org.onosproject.ui.UiMessageHandler;
 import org.onosproject.ui.table.AbstractTableRow;
 import org.onosproject.ui.table.RowComparator;
 import org.onosproject.ui.table.TableRow;
@@ -43,7 +43,7 @@
 /**
  * Message handler for flow view related messages.
  */
-public class FlowViewMessageHandler extends UiMessageHandlerTwo {
+public class FlowViewMessageHandler extends UiMessageHandler {
 
     private static final String FLOW_DATA_REQ = "flowDataRequest";