OZP-73
* Created a "Request Scoped Persistence" bundle which defines a ServletFilter for beginning and closing the unit of work per request.
* Removed @Entity and javax.persistence from Domain as it does not need nor should be there
* Tweaked Blueprint configuration to get UnitOfWorkManager to wire EntityManager's to the Repositories correctly
* Added a debug-commands bundle which defines some Karaf commands that are useful for testing and scaffolding a developer's environment (e.g. ozp:createschema will create the tables we need in an embedded derby)
* There are some println's lingering about from debugging
OZP 73 Replaced the Unit of Work Servlet filter since it is not honored by Pax Web with CXF. Needed to replace it with a CXF filter in the OWF REST project. Will attempt to once again make this external to the OWF project by defining a CXF filter in a commons bundle and try to append it to JAX-RS servers defined in other bundles (e.g. the OWF rest bundle)