Zabbix

.......... [DEV-2733] added new test cases for testFormConnectors

Merge in ZBX/zabbix from feature/DEV-2733-6.5 to master

* commit '6f93eb5cae491d919f2ceacad04479323fc7ae92':
  .......... [DEV-2733] added fixes regarding code review
  .......... [DEV-2733] removed variable
  .......... [DEV-2733] added positive cases for update/create scenarios
  .......... [DEV-2733] added negative cases for update/create scenarios
  .......... [DEV-2733] updated layout test scenario
  .......... [DEV-2733] replaced access modifiers; updated trim check