Workflow actions not translated when invoked via WpmDocmentWorkflowImpl#triggerAction()

With projects we override DocumentWorkflow#triggerAction(). As a consequence, the hippolog:methodName in the event is triggerAction and the hippolog:action is the action that is actually performed.

Unfortunately the EventModel currently uses the hippolog:methodName to represent the lookup key for a translation, which will always be triggerAction for Wpm document workflows. Hence we cannot lookup translations by action.