CMMN - retrieving the form key using the form service

Hi Bernd,

For the method FormService#getTaskFormData you need to provide an id of an org.camunda.bpm.engine.task.Task instance. Note that such tasks are used in the context both BPMN and CMMN, and represent a unit of work a human has to perform. Accordingly, in CMMN a Task instance is created when a humanTask plan item reaches the ACTIVE state. You can find a Task via TaskService#createTaskQuery. The query has a filter by case execution id.