Zabbix

.......... [DEV-2056] improved macro resolving cases

Merge in ZBX/zabbix from feature/DEV-2056-5.5 to master

* commit 'd2a9122e7a779ef2bce01142fea5a7f0ce21f042':
  .......... [DEV-2056] moved common code from host prototypes and revert secret macros case
  .......... [DEV-2056] fixed typo
  .......... [DEV-2056] moved common code to separate class
  .......... [DEV-2056] fixed comments
  .......... [DEV-2056] rewrote macro resolving tests
  .......... [DEV-2056] added not resolved macro case
  .......... [DEV-2056] added macro to name and key