Zabbix

A........T [DEV-1439] added unit tests for mediatype import; fixed default value for "show_event_menu"

* commit 'be94b49d0bb6311acda0555dcbbe0058049d09c6':
  .........T [DEV-1439] fixed webhook mediatype XML templates
  .......... [DEV-1439] added unit tests for media types of types script and webhook
  A......... [DEV-1439] fixed default value for "show_event_menu"
  .......... [DEV-1439] added unit tests for mediatype import

(cherry picked from commit 527b759bbe13c923a841aa7c7f9c7108d21a3267)