4. The driver and the Integrated Authentication are loaded fine and the error has to do with the sda-ds.xml or the persistence.xml.
Either specific type-mappings need to be specified in sda-ds.xml or specific jta-datasource properties needs to be added in the persistence.xml (sda.war\WEB-INF\classes\META-INF\persistence.xml) for both servicedeskappGlobalDatasource and the sdaDatasource.
5. It used to work in EAP 4.3.0 CP03 and not on EAP 5.1.0 GA.