Change license from ONF-Member-Only to Apache-2.0

Change-Id: I031b31427f78d0c238342124638327fcc933ea29
diff --git a/dbuf/templates/_helpers.tpl b/dbuf/templates/_helpers.tpl
index b8b672a..6143765 100644
--- a/dbuf/templates/_helpers.tpl
+++ b/dbuf/templates/_helpers.tpl
@@ -1,6 +1,6 @@
 {{/*
 Copyright 2020-present Open Networking Foundation
-SPDX-License-Identifier: LicenseRef-ONF-Member-Only-1.0
+SPDX-License-Identifier: Apache-2.0
 */}}
 
 {{- define "extraParams" -}}