The config value comes from the ActorSystemActivator, it may be overrided by the user to let him defines its own configuration (as we discuss on Monday with Raman).

You may, in your class extending ActorSystemActivator override the getActorSystemConfig such as 
``override def getActorSystemConfig(context: BundleContext) = ConfigFactory.parseFile(new File("./etc/akka.conf"))``
Of course, it's tricky to test in the osgi sample as it we need to override something that is not yet in dependencies...