Reduce size of jenkins logs

Each build is now over 40mb logs.

A lot of DEBUG logging was left on for test failures that have been
fixed. Added an issue # for ones that are still valid or if if it on
as the test verifies debug

akka-cluster/src/test/scala/akka/cluster/ClusterSpec.scala

@@ -235,7 +235,6 @@ class ClusterSpec extends AkkaSpec(ClusterSpec.config) with ImplicitSender {
         akka.remote.artery.canonical.port = 0
         akka.coordinated-shutdown.terminate-actor-system = on
         akka.cluster.run-coordinated-shutdown-when-down = on
-akka.loglevel=DEBUG
         """))
       try {
         val probe = TestProbe()(sys3)