[SEBA-974] Add copyright for Edgecore

Change-Id: I82a625d63ae02eb594507dcce4f39bcb59cb08f3
diff --git a/demo_test/Dockerfile b/demo_test/Dockerfile
index efd6ce9..d7113ba 100644
--- a/demo_test/Dockerfile
+++ b/demo_test/Dockerfile
@@ -1,4 +1,5 @@
-# copyright 2018-present Open Networking Foundation
+# Copyright 2018-present Open Networking Foundation
+# Copyright 2018-present Edgecore Networks Corporation
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.