feat(bpmn): add possibility to define calledElement in callActivity with
more details
- add new attributes to callActivity to define processdefinition version
  and process binding
- add new prepared query to get process definition for process definition key and
  deployment id
- add new test cases

related to CAM-948
Merge branch 'CAM-948-CallActivity' of git://github.com/polenz/camunda-bpm-platform into merge