Zabbix

.......... [DEV-2653] replaced DBexecute commands used for problem and event creation

Merge in ZBX/zabbix from feature/DEV-2653-6.5 to master

* commit 'baa8fa1b05c9ab12c2b2d14c4d0e12f89f277e7e':
  .......... [DEV-2653] added fixes regarding code review
  .......... [DEV-2653] added fixes regarding code review
  .......... [DEV-2653] fixed severity status
  .......... [DEV-2653] removed unused variable, fixed comment
  .......... [DEV-2653] added problem and event creation method for testDashboardProblemsWidgetDisplay and testFormUpdateProblem
  .......... [DEV-2653] added problem and event creation method, removed DBexecute commands