+con #3551 Buffer messages in cluster client

* Stash when establishing connection to receptionist

akka-contrib/src/multi-jvm/scala/akka/contrib/pattern/ClusterClientSpec.scala

@@ -103,11 +103,8 @@ class ClusterClientSpec extends MultiNodeSpec(ClusterClientSpec) with STMultiNod
     "communicate to actor on any node in cluster" in within(10 seconds) {
       runOn(client) {
         val c = system.actorOf(ClusterClient.props(initialContacts))
-
-        awaitAssert {
-          c ! ClusterClient.Send("/user/testService", "hello", localAffinity = true)
-          expectMsg(1 second, "ack")
-        }
+        c ! ClusterClient.Send("/user/testService", "hello", localAffinity = true)
+        expectMsg("ack")
       }
       runOn(fourth) {
         expectMsg("hello")
@@ -133,6 +130,11 @@ class ClusterClientSpec extends MultiNodeSpec(ClusterClientSpec) with STMultiNod
       }
       //#server
 
+      runOn(host1, host2, host3) {
+        awaitCount(4)
+      }
+      enterBarrier("services-replicated")
+
       //#client
       runOn(client) {
         val c = system.actorOf(ClusterClient.props(initialContacts))
@@ -141,6 +143,11 @@ class ClusterClientSpec extends MultiNodeSpec(ClusterClientSpec) with STMultiNod
       }
       //#client
 
+      runOn(client) {
+        // note that "hi" was sent to 2 "serviceB"
+        receiveN(3).toSet must be(Set("hello", "hi"))
+      }
+
       { //not used, only demo
         //#initialContacts
         val initialContacts = Set(
@@ -165,10 +172,8 @@ class ClusterClientSpec extends MultiNodeSpec(ClusterClientSpec) with STMultiNod
       runOn(client) {
         val c = system.actorOf(ClusterClient.props(initialContacts))
 
-        awaitAssert {
-          c ! ClusterClient.Send("/user/service2", "bonjour", localAffinity = true)
-          expectMsg(1 second, "ack")
-        }
+        c ! ClusterClient.Send("/user/service2", "bonjour", localAffinity = true)
+        expectMsg("ack")
         val lastSenderAddress = lastSender.path.address
         val receptionistRoleName = roleName(lastSenderAddress) match {
           case Some(r) ⇒ r