ONOS-1479 - GUI Topology Overlay Work - (WIP)
- UiExtension now uses Builder Pattern; added topology overlay factory.
- Refactored UiExtensionTest (and other classes) to use builder.
- Created UiTopoOverlayFactory, UiTopoOverlay, and TopoOverlayCache.
- Started implementation of TrafficOverlay.
- Inject TopoOverlayCache into TopologyViewMessageHandler; added TopoSelectOverlay request handler.
- Modified UiExtensionManager to create traffic overlay.
- Augmented UiWebSocket to create overlays on demand, and inject overlay cache into topo view message handler.
- added client side wiring to switch overlays.

Change-Id: I6f99596aefb3b87382517ce929d268a2447545ee
diff --git a/tools/package/archetypes/ui/src/main/resources/archetype-resources/src/main/java/AppUiComponent.java b/tools/package/archetypes/ui/src/main/resources/archetype-resources/src/main/java/AppUiComponent.java
index 1d241091..f40bcb5 100644
--- a/tools/package/archetypes/ui/src/main/resources/archetype-resources/src/main/java/AppUiComponent.java
+++ b/tools/package/archetypes/ui/src/main/resources/archetype-resources/src/main/java/AppUiComponent.java
@@ -57,8 +57,9 @@
 
     // Application UI extension
     protected UiExtension extension =
-            new UiExtension(uiViews, messageHandlerFactory,
-                            getClass().getClassLoader());
+            new UiExtension.Builder(getClass().getClassLoader(), uiViews)
+                    .messageHandlerFactory(messageHandlerFactory)
+                    .build();
 
     @Activate
     protected void activate() {