Zabbix

.......... [DEV-4758] fixed Selenium tests, removed two scenarios, added one scenario

* commit 'd5a416380645e1cb0c874438a6eefb28236ca977':
  .......... [DEV-4758] removed workaround that most likely is no longer required
  .......... [DEV-4758] fixed issues according to review comments
  .......... [DEV-4758] fixed syntax-check error
  .......... [DEV-4758] Improved formatting
  .......... [DEV-4758] Added new scenario; improved formatting
  .......... [DEV-4758] fixed testPageMonitoringHostsGraph_CheckFilter