Updating Copyright line to Open Networking Foundation

Change-Id: I6239025496ae9c2fd423ef6e7cf55e8b023cfa66
diff --git a/app/app.xml b/app/app.xml
index 9be435f..ec55db7 100644
--- a/app/app.xml
+++ b/app/app.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!--
-  ~ Copyright 2016-present Open Networking Laboratory
+  ~ Copyright 2016-present Open Networking Foundation
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
   ~ you may not use this file except in compliance with the License.