WorkflowManagement.getTasksForActor
Answers a list of TaskEnactmentDescriptors, each of which describes a particular item which is either
on, or could appear on, a users tasklist. That is, it is representation of a current
InteractiveTaskEnactment that is either in state Unassigned, or is in some other state but has
the given actor as the defined specific resource.
returns java.util.List