Publish member events when state change first seen, see #3075

* Remove InstantMemberEvent

akka-cluster/src/multi-jvm/scala/akka/cluster/NodeLeavingAndExitingSpec.scala

@@ -45,16 +45,12 @@ abstract class NodeLeavingAndExitingSpec
 
       runOn(first, third) {
         val secondAddess = address(second)
-        val leavingLatch = TestLatch()
         val exitingLatch = TestLatch()
         cluster.subscribe(system.actorOf(Props(new Actor {
           def receive = {
             case state: CurrentClusterState ⇒
-              if (state.members.exists(m ⇒ m.address == secondAddess && m.status == Leaving))
-                leavingLatch.countDown()
               if (state.members.exists(m ⇒ m.address == secondAddess && m.status == Exiting))
                 exitingLatch.countDown()
-            case MemberLeft(m) if m.address == secondAddess   ⇒ leavingLatch.countDown()
             case MemberExited(m) if m.address == secondAddess ⇒ exitingLatch.countDown()
             case MemberRemoved(m)                             ⇒ // not tested here
 
@@ -70,9 +66,6 @@ abstract class NodeLeavingAndExitingSpec
         val expectedAddresses = roles.toSet map address
         awaitCond(clusterView.members.map(_.address) == expectedAddresses)
 
-        // Verify that 'second' node is set to LEAVING
-        leavingLatch.await
-
         // Verify that 'second' node is set to EXITING
         exitingLatch.await