ONOS-6730: Topo View i18n:
- augmented UiMessageHandler base class to allow injection of
  localization bundles, so that the handler can look up localized
  text when composing data to ship to the client.
- i18n'd the Summary Panel in Topo view.

Change-Id: I15010d1e2fcce72e3133a9ce40e51510c8f5146f
diff --git a/web/gui/src/main/resources/org/onosproject/ui/lion/core/view/Topo.properties b/web/gui/src/main/resources/org/onosproject/ui/lion/core/view/Topo.properties
index c6adb3e..c32cd6a 100644
--- a/web/gui/src/main/resources/org/onosproject/ui/lion/core/view/Topo.properties
+++ b/web/gui/src/main/resources/org/onosproject/ui/lion/core/view/Topo.properties
@@ -76,6 +76,7 @@
 fl_layer_opt=Optical Layer Shown
 
 fl_panel_instances=Instances Panel
+fl_panel_summary=Summary Panel
 
 fl_port_highlighting=Port Highlighting
 
@@ -91,3 +92,4 @@
 
 # Miscellaneous
 title_select_map=Select Map
+title_panel_summary=ONOS Summary