GUI -- Preliminary work for converting tabular views to use the shared web-socket rather than via REST. WIP.

Change-Id: I68de98e8df0a2bbcebe15ad9015ce6b4df43d81c
diff --git a/web/gui/src/main/java/org/onosproject/ui/impl/UiExtensionManager.java b/web/gui/src/main/java/org/onosproject/ui/impl/UiExtensionManager.java
index db5f90d..73f7b8e 100644
--- a/web/gui/src/main/java/org/onosproject/ui/impl/UiExtensionManager.java
+++ b/web/gui/src/main/java/org/onosproject/ui/impl/UiExtensionManager.java
@@ -58,10 +58,13 @@
     private static UiExtension createCoreExtension() {
         List<UiView> coreViews = of(new UiView("topo", "Topology View"),
                                     new UiView("device", "Devices"),
+                                    new UiView("host", "Hosts"),
                                     new UiView("sample", "Sample"));
         UiMessageHandlerFactory messageHandlerFactory =
                 () -> ImmutableList.of(
-                        new TopologyViewMessageHandler()
+                        new TopologyViewMessageHandler(),
+                        new DeviceViewMessageHandler(),
+                        new HostViewMessageHandler()
                 );
         return new UiExtension(coreViews, messageHandlerFactory, "core",
                                UiExtensionManager.class.getClassLoader());