Zabbix

.........T [ZBXNEXT-6367] added metrics to the official MySQL template

Merge in ZBX/zabbix from feature/ZBXNEXT-6367-5.0 to release/5.0

* commit '7360243b43b985fdfd4833bc798f289c741b0ecf':
  .........T [ZBXNEXT-6367] changed spelling of gtid to uppercase
  .........T [ZBXNEXT-6367] removed calculated item mysql.binlog_commits_diff with trigger
  .........T [ZBXNEXT-6367] removed "change per second" for Binlog items, added calculated item mysql.binlog_commits_diff
  .........T [ZBXNEXT-6367] changed preprocessing steps
  .........T [ZBXNEXT-6367] added metrics to the official MySQL template