verify jbpm/soa integration

ESB people have already done some good work on trying to get jBPM integrated into ESB and the rest of the SOA platform. But this work should be verified from a jBPM perspective.

Mainly it should be verified if there is enough coverage of the different transaction scenarios. E.g. a rollback in case of multiple transactional resources.

More can be found in the related SOA-628 issue description