!osg, pro Updated OSGi dependencies and fixed integration test

* Numerous version upgrades to dependencies
* Publish integration test maven dependencies automatically
* Use slf4j logging, with standard OPS4j Pax Logging
* Maven and sbt use different target directories
* Update to newer config library that fixes ConfigException serialization issue
* Include akka-testkit/reference.conf (and some others) in the config file copying
* Add a custom serializer to the integration test
* Add akka-persistence to the integration test

This is a hackathon team effort by:
* Björn Antonsson
* Endre Sándor Varga
* Roland Kuhn
* Patrik Nordwall