Updating copyrights

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

Change-Id: I1a9e58b355b775e75245ad875a2d7a4df3f03098
diff --git a/core/api/src/main/java/org/onosproject/net/behaviour/PortDiscovery.java b/core/api/src/main/java/org/onosproject/net/behaviour/PortDiscovery.java
index a825a8d..7847cd5 100644
--- a/core/api/src/main/java/org/onosproject/net/behaviour/PortDiscovery.java
+++ b/core/api/src/main/java/org/onosproject/net/behaviour/PortDiscovery.java
@@ -1,6 +1,6 @@
 /*
  *
- *  * Copyright 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.