akka/akka — pull request #2128 by AhmedSoliman (2014-04-10 16:01:46+00:00)
Title: Fixes unsubscribe of DistributedPubSubMediator to actually receive the U...

Unsubscribe of `DistributedPubSubMediator` never responded with `UnsubscribeAck` as documented. There was a bug (tell instead of forward). This also adds a test case for that.