Zabbix

..F....... [ZBX-16012] fixed confusing error message "Cannot read JSON." in HTTP agent item

* commit '8c983c8c4e046d64505a2def61899a45072d1aa3':
  .D........ [ZBX-16012] added new ChangeLog entry
  A......... [ZBX-16012] reverted changes in exception message
  .......... [ZBX-16012] added posibility for autotests to handle both single and double quotes in error messages
  A......... [ZBX-16012] fixed quotes in exception message
  ..F....... [ZBX-16012] updated selenium tests
  A......... [ZBX-16012] moved changes to api validation
  ..F....... [ZBX-16012] fixed confusing error message "Cannot read JSON." in HTTP agent item