Zabbix

.......... [DEV-2159] fixed integration tests

Merge in ZBX/zabbix from feature/DEV-2159-6.1 to master

* commit '3212377cae494af057a010a56846304684228b80':
  .......... [DEV-2159] fixed HA manager reserve stop
  .......... [DEV-2159] fixed spaces
  .......... [DEV-2159] fixed warnings in PR
  .......... [DEV-2159] fixed vfs.file.get test
  .......... [DEV-2159] removed trailing spaces2
  .......... [DEV-2159] removed trailing spaces
  .......... [DEV-2159] added reserve process kill
  .......... [DEV-2159] fixed testGoAgentDataCollection for last value
  .......... [DEV-2159] reverted offset calculation for last metric in testGoAgentDataCollection
  .......... [DEV-2159] added offset calculation for last metric in testGoAgentDataCollection
  .......... [DEV-2159] removed debug code
  .......... [DEV-2159] debug code
  .......... [DEV-2159] reverted testAgentItems
  .......... [DEV-2159] fixed testAgentItems
  .......... [DEV-2159] fixed testItemState