I've completed my demo workspace which uses Akka together with Bndtools.
Instead of following the akka-documentation using an Activator, I've wrapped the ActorSystem within a Declarative-Service component which can be configured.
Thanks to the Bndtools community (BJ) for helping out with the Scala config and pointing out some errors :-)
Beware: the example uses Scala 2.12 which is not yet supported by "Scala IDE", so compiling is done on the command line with Gradle.
regards
Marc