Bug#27710661 SERVICE START FAILED TO CREATE DATABASE IF IT DOESN'T EXISTS

The systemd service script didn't correctly source the helper script responsible
for making sure the database files are ready.

Author: ltangvald

packaging/deb-in/extra/mysql-systemd-start

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-# Copyright (c) 2015, 2017, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved.
 #
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License, version 2.0,
@@ -29,7 +29,7 @@
 # pre mode  :  try to perform sanity check for configuration, log, data
 
 # Include helper functions
-. /usr/share/mysql/mysql-helpers
+. /usr/share/mysql-@MYSQL_BASE_VERSION@/mysql-helpers
 
 sanity () {
 # Make sure database and required directories exist