Obd Server

An internal server error ocurred when trying to delete a group:

A JTA EntityManager cannot use getTransaction(); nested exception is java.lang.IllegalStateException: A JTA EntityManager cannot use getTransaction()

Make a test to delete a group throw ObdGroupService.
Make a test to create a group, so ObdVinGroupService will also called.
Make use of the @Transactional and @EnableTransactionManagement annotations into ObdGroupService.deleteGroup and Application, respectively.
Try to modify GeronimoTransactionManagerFactory and JTA EntityManager by JPA.