Zabbix

.......... [DEV-2424] added new Selenium autotest for host groups page

Merge in ZBX/zabbix from feature/DEV-2424-6.0 to release/6.0

* commit '582013ccd57ee15323674312ec03ce54f154ba41':
  .......... [DEV-2424] removed 'true' for click in filter element and fixed event correlation test
  .......... [DEV-2424] renamed method, added return and fixed code
  .......... [DEV-2424] fixed test data in script test
  .......... [DEV-2424] added filter element
  .......... [DEV-2424] fixed tests after update to the latest 6.0
  .......... [DEV-2424] fixed data source name
  .......... [DEV-2424] fixed trailing comma
  .......... [DEV-2424] added fixes after review
  .......... [DEV-2424] fixed tests and table trait
  .......... [DEV-2424] changed variables to const
  .......... [DEV-2424] fixed tests related to host groups
  .......... [DEV-2424] renamed table trait function
  .......... [DEV-2424] changed count in delete test, fixed typo and sla test
  .......... [DEV-2424] fixed table trait function and renamed variable
  .......... [DEV-2424] added new test for host groups page