Updating Copyright line to Open Networking Foundation

Change-Id: I06957aa05eb1517ccd89b519d437b9302e20553b
diff --git a/app.xml b/app.xml
index 3c3017d..9d0658a 100644
--- a/app.xml
+++ b/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.