chore(engine): remove leftover code
chore(engine): enable TestHelper to find CMMN suffixes for @Deployment

- the @Deployment annotation will now auto detect BPMN and CMMN
  resources based on the method name
- BPMN suffixes are tested prior CMMN suffixes
chore(engine): deprecate getPre/PostParseListener methods
feat(engine): add CmmnTransformListener implementation

related to #CAM-2838