add the license header to fix the build error

data-model/DDL/create_all_tables_wrapper.sql

@@ -1,3 +1,17 @@
+--
+-- Copyright 2015 LinkedIn Corp. All rights reserved.
+--
+-- 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.
+--
+
 /* wrapper sql to call all individual DDL */
 use wherehows;