Zabbix

...G...... [ZBX-20038] fixed master host parameter for MySQL replication.get_slave_status key in Zabbix agent 2

* commit 'c0cfae7d7907b99a243744543112989c8eab0b99':
  ...G...... [ZBX-20038] code clean up
  ...G...... [ZBX-20038] updated mysql plugin README in Zabbix agent 2
  .......... [ZBX-20038] added change log
  ...G...... [ZBX-20038] fixed master host parameter for MySQL replication.get_slave_status key in Zabbix agent 2