Zabbix

........S. [DEV-2597] refactored escalator library

* commit '47bd721080cc7a0ce7665eb7f3e68a715767f626':
  ........S. [DEV-2597] fixed jenkins biuld
  .......... [DEV-2597] updated function descriptions 2
  .......... [DEV-2597] updated function descriptions
  ........S. [DEV-2597] fixed new comments found during review
  ........S. [DEV-2597] merged variable declarations in function check_operation_conditions()
  ........S. [DEV-2597] removed empty line
  ........S. [DEV-2597] addressed new comments during review
  ........S. [DEV-2597] fixed jenkins build
  ........S. [DEV-2597] addressed refactoring comments after the review
  ........S. [DEV-2597] refactored escalator library according the requirements