Zabbix

........S. [ZBX-21074] fixed active check availability status update on oracle

* commit '498af693dbbee514bdace6e71bc2a3c3386b17e0':
  ........S. [ZBX-21074] removed redundant variable
  ........S. [ZBX-21074] removed host active availability flushing on agent hearbeat even if the availability didn't change
  ........S. [ZBX-21074] fixed active check availability status update on oracle