* Introduce different types of Multi Action Event to distinguish between an Assignment and a Cancel.
* Minimize the payload for the multiAction assignment and cancel event. Write tests for the MultiActionCancelEvent.
* Remove unused action status.
* Move list of actionIds to MultiActionEvent and declare it as abstract.
* Remove unused imports.
Signed-off-by: Michael Herdt <Michael.Herdt2@bosch-si.com>