WorkflowManager[simple-spring]: fixing JPA issue by using JavaEE default (EJB container) mechanisms for managing the life cycle of SLSBs by using @EJB(mappedName="java:module/XxxService") instead of Spring @Autowired annotation when injecting the bean. Also AbstractEntity was annotated with @MappedSuperclass instead of @Entity.
Merge pull request #8 from imre-szekeres/simple-spring

WorkflowManager[simple-spring]: fixing JPA issue by using JavaEE default...