Zabbix

.......... [DEV-3017] added new test cases for top hosts widget with aggregation function

Merge in ZBX/zabbix from feature/DEV-3017-6.5 to master

* commit '9c69457b79848c600040e302fee75c160d4d556b':
  .......... [DEV-3017] fixed code style
  .......... [DEV-3017] added fixes regarding code review
  .......... [DEV-3017] fixed backup
  .......... [DEV-3017] added fixes regarding code review
  .......... [DEV-3017] fixed comments and code style; changed data provider
  .......... [DEV-3017] changed createTopHostsWidget method
  .......... [DEV-3017] fixed unstable test
  .......... [DEV-3017] fixed unstable test
  .......... [DEV-3017] fixed unstable test
  .......... [DEV-3017] added new test cases for aggregation function data check
  .......... [DEV-3017] fixed unstable tests; renamed function
  .......... [DEV-3017] added new test cases for aggregation function data check
  .......... [DEV-3017] added test scenario for aggregation function data check
  .......... [DEV-3017] changed constant name
  .......... [DEV-3017] fixed unstable tests
  .......... [DEV-3017] added test cases for threshold color check
  .......... [DEV-3017] fixed unstable tests
  .......... [DEV-3017] updated data source