!per #3828 Rename receiveReplay to receiveRecover

- because it handles messages related to recovery (snapshots and replayed messages)

akka-docs/rst/scala/code/docs/persistence/PersistenceDocSpec.scala

@@ -295,7 +295,7 @@ trait PersistenceDocSpec {
         channel ! Deliver(Persistent(event), destination.path)
       }
 
-      def receiveReplay: Receive = {
+      def receiveRecover: Receive = {
         case event: String => handleEvent(event)
       }