Merge into master from pull request #261:

merge request for access modifier change for change in device update. (https://github.com/floodlight/floodlight/pull/261)

src/main/java/net/floodlightcontroller/devicemanager/internal/DeviceManagerImpl.java

@@ -202,7 +202,7 @@ IFlowReconcileListener, IInfoProvider, IHAListener {
      * A device update event to be dispatched
      */
     protected static class DeviceUpdate {
-        protected enum Change {
+        public enum Change {
             ADD, DELETE, CHANGE;
         }