The PersistenceProviderAdaptor code lives in the JipiJapa project.  Because the PersistenceProviderAdaptor's are built in an external project, we should be able to add the different PersistenceProviderAdaptor to WildFly without adding dependencies on the actual persistence providers (currently, Paul manually removes OpenJPA references in EAP).  

I'm not sure of how to best test using different persistence providers, with WildFly.