chore(pom): move comment above profile to fix bash completion
chore(engine): ensure backwards compatibility of engine configuration

related to #CAM-2979
chore(engine): add createComment to ensure api backwards compatibility

related to #CAM-2979
feat(rest): provide /data for all variable resources

related to #CAM-2895
chore(engine-rest): refactor root resources

- makes resources like ProcessDefinitionRestService sub resources of one
  common entry point *ProcessDefinitionRestService
- resolves issues with these resources being sometimes root and sometimes
  sub resources

related to CAM-2996
fix(rest): always execute count on hal list in filter

- count is the number of entities matching the extended filter
  without pagination
chore(engine): remove unused parameter

related to #CAM-2868