[DMN Designer] Refactor DataObjectsServiceImpl to not duplicate logic from ParseHelper -------------------------------------------------------------------------------------- Key: DROOLS-4977 URL: https://issues.redhat.com/browse/DROOLS-4977 Project: Drools Issue Type: Enhancement Components: DMN Editor Reporter: Daniel José dos Santos Assignee: Daniel José dos Santos Priority: Minor Labels: drools-tools Currently we have logic from [ParserHelper|https://github.com/kiegroup/drools/blob/master/kie-dmn/kie-d...] duplicated in [DataObjectsServiceImpl|https://github.com/kiegroup/kie-wb-common/blob/969...] which may lead to some inconsistencies. `DataObjectsServiceImpl` should use `ParserHelper` and convert the result to a type that can be used by UI. This JIRA is derived from [RHDM-1145|https://issues.redhat.com/browse/RHDM-1145].