Add 'json' to the DeviceManager's REST API to be consistent with the rest....

Add 'json' to the DeviceManager's REST API to be consistent with the rest. Ending the path in a / is bad REST practice.

src/main/java/net/floodlightcontroller/devicemanager/web/DeviceRoutable.java

@@ -36,7 +36,7 @@ public class DeviceRoutable implements RestletRoutable {
     @Override
     public Restlet getRestlet(Context context) {
         Router router = new Router(context);
-        router.attach("/", DeviceResource.class);
+        router.attach("/json", DeviceResource.class);
         router.attach("/debug", DeviceEntityResource.class);
         return router;
     }