Updating copyrights

New format: 'Copyright .year-present Open Networking Laboratory'

Change-Id: I1a9e58b355b775e75245ad875a2d7a4df3f03098
diff --git a/web/gui/src/main/webapp/_dev/overlaywork/AppUiTopoOverlay.java b/web/gui/src/main/webapp/_dev/overlaywork/AppUiTopoOverlay.java
index aad890c..784630b 100644
--- a/web/gui/src/main/webapp/_dev/overlaywork/AppUiTopoOverlay.java
+++ b/web/gui/src/main/webapp/_dev/overlaywork/AppUiTopoOverlay.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2015,2016 Open Networking Laboratory
+ * Copyright 2016-present Open Networking Laboratory
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.