Minor touchups and cleanups in ActorSelection
unhandled msg in cluster StressSpec
Merge pull request #1565 from akka/wip-actor-selection-touchup-√

Minor touchups and cleanups in ActorSelection
Merge pull request #1569 from akka/wip-unhandled-msg-StressSpec-patriknw

unhandled msg in cluster StressSpec
Merge remote-tracking branch 'upstream/master'