Updating copyrights

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

Change-Id: I1a9e58b355b775e75245ad875a2d7a4df3f03098
diff --git a/apps/dhcp/app/src/main/resources/OSGI-INF/blueprint/shell-config.xml b/apps/dhcp/app/src/main/resources/OSGI-INF/blueprint/shell-config.xml
index ce71631..6bf96a5 100644
--- a/apps/dhcp/app/src/main/resources/OSGI-INF/blueprint/shell-config.xml
+++ b/apps/dhcp/app/src/main/resources/OSGI-INF/blueprint/shell-config.xml
@@ -1,5 +1,5 @@
 <!--
-  ~ Copyright 2014 Open Networking Laboratory
+  ~ Copyright 2015-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.