VOL-1176: Ported callback mechanism
- Updated some files with the license block

Change-Id: I61db400b3a72c4915f4f3f17cc7a110313c2d25e
diff --git a/db/model/utils_test.go b/db/model/utils_test.go
index caf540c..644e6e2 100644
--- a/db/model/utils_test.go
+++ b/db/model/utils_test.go
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018-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.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package model
 
 import (