Zabbix

.......PS. [DEV-4909] fixed memory leaks caused by improper use of zbx_json_clean()

* commit 'f7302043acb624da997485c7931b808c21661125':
  ........S. [DEV-4909] added new integration test
  .......PS. [DEV-4909] memory leaks caused by improper use of zbx_json_clean(), reanamed zbx_json_clean() to zbx_json_reset()