Fixing pid file path.

lemp-rhel7/roles/ansible-role-mysql/vars/RedHat-7.yml

@@ -9,7 +9,7 @@ __mysql_packages:
 __mysql_slow_query_log_file: /var/log/mysql-slow.log
 mysql_log_error: /var/log/mariadb/mariadb.log
 mysql_syslog_tag: mariadb
-mysql_pid_file: /var/run/mariadb/mariadb.pid
+mysql_pid_file: /var/lib/mysql/mariadb.pid
 mysql_config_file: /etc/my.cnf
 mysql_config_include_dir: /etc/my.cnf.d
 mysql_socket: /var/lib/mysql/mysql.sock