Zabbix

.........T [ZBXNEXT-6316] added iTop media

Merge in ZBX/zabbix from feature/ZBXNEXT-6316-5.0 to release/5.0

* commit '48d94e91b1acdfd2ab39b41bd3a85ef39295fea6':
  .........T [ZBXNEXT-6316] fixed readme
  .........T [ZBXNEXT-6316] fixed after QA
  .........T [ZBXNEXT-6316] fixed indentations
  .........T [ZBXNEXT-6316] fixed error for null response
  .........T [ZBXNEXT-6316] fixed indentations
  .........T [ZBXNEXT-6316] fixed typo in readme
  .........T [ZBXNEXT-6316] fixed indentations
  .........T [ZBXNEXT-6316] added typo in readme
  .........T [ZBXNEXT-6316] added "itop_comment" parameter description to readme
  .........T [ZBXNEXT-6316] fixed after review
  .........T [ZBXNEXT-6316] fixed typo in readme
  .........T [ZBXNEXT-6316] added readme
  .........T [ZBXNEXT-6316] added iTop media