New version 31.21-1
    
    - Always schedule the installation task for joining realm (#1732620) (vponcova)
    - Fix issue raised by giving publisher as last parameter (jkonecny)
    - Use the new publisher patch decorator in a tests (jkonecny)
    - Add decorator as shortcut for a publisher patching (jkonecny)
    - Add test for creating invalid payload handler (jkonecny)
    - Fix tests after removing handlers publish method (jkonecny)
    - Remove _publish_handler method from payload module (jkonecny)
    - Fix tests because of new payload API change (jkonecny)
    - Remove get_handler_path from payload handlers (jkonecny)
    - Return path from payload handler publish methods (jkonecny)
    - Join all the payload handler create methods (jkonecny)
    - Publish payload handler after KS data are parsed (jkonecny)
    - Add handler factory and use that in payload module (jkonecny)
    - Add tests for new payload API (jkonecny)
    - Do not create payload handler if already set (jkonecny)
    - Add API to test if there is a payload handler set (jkonecny)
    - Do not set default payload handler (jkonecny)
    - Don't prune and sort actions in the partitioning task (vponcova)
    - Fix imports in the tests (jkonecny)
    - Adapt payload tests to a new task check function (jkonecny)
    - Adapt network tests to a new task check function (jkonecny)
    - Adapt localization tests to a new task check function (jkonecny)
    - Adapt bootloader test to a new task check function (jkonecny)
    - Adapt storage tests to a new check task function (jkonecny)
    - Make a new test func to check task creation (jkonecny)
    - Add test for new payload API on live image creation (jkonecny)
    - Add new payload API to create live image handler (jkonecny)
    - Add tests for new payload handlers solution (jkonecny)
    - Fix tests after payload handler logic change (jkonecny)
    - Add support to create DNF payload handler (jkonecny)
    - Improve payload handler creation abstraction (jkonecny)
    - Publish payload handler before it is set (jkonecny)
    - Fix payload generate_kickstart with no handler (jkonecny)
    - Add payload module API to get active handler (jkonecny)
    - Publish handler in the creation method call (jkonecny)
    - Propagate DBus path when creating handler (jkonecny)
    - Use base handler class by the handler modules (jkonecny)
    - Add payload handler base class (jkonecny)
    - Change main payload handlers to property (jkonecny)
    - Add root password SSH login override checkbox (#1716282) (mkolman)