Fix license header

application/src/main/data/upgrade/3.2.1/schema_update_ttl.sql

@@ -1,3 +1,19 @@
+--
+-- Copyright © 2016-2021 The Thingsboard Authors
+--
+-- 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.
+--
+
 CREATE OR REPLACE PROCEDURE cleanup_timeseries_by_ttl(IN null_uuid uuid,
                                                       IN system_ttl bigint, INOUT deleted bigint)
     LANGUAGE plpgsql AS