Zabbix

.......... [DEV-2507] reworked Network Discovery form test

Merge in ZBX/zabbix from feature/DEV-2507-6.4 to release/6.4

* commit '4f21be4efdf22b85b715b0403921b7a3c35d2c03':
  .......... [DEV-2507] fixed drule page test
  .......... [DEV-2507] fixed data source
  .......... [DEV-2507] fixed formatting
  .......... [DEV-2507] fixed formatting
  .......... [DEV-2507] removed todos
  .......... [DEV-2507] fixed proxy page test
  .......... [DEV-2507] replaced TODO number
  .......... [DEV-2507] fixed proxy tests
  .......... [DEV-2507] fixed formatting
  .......... [DEV-2507] updated test
  .......... [DEV-2507] updated test
  .......... [DEV-2507] fixed data source
  .......... [DEV-2507] added some minor fixes
  .......... [DEV-2507] rewrote network discovery test