[Obsolete] warning disable CS0618 (#6646)

Author: eaba

src/core/Akka.TestKit/TestProbe.cs

@@ -127,7 +127,9 @@ ISurrogate ISurrogated.ToSurrogate(ActorSystem system)
 
         IActorRefProvider IInternalActorRef.Provider { get { return ((IInternalActorRef)TestActor).Provider; } }
 
+#pragma warning disable CS0618 // Type or member is obsolete
         bool IInternalActorRef.IsTerminated { get { return ((IInternalActorRef)TestActor).IsTerminated; } }
+#pragma warning restore CS0618 // Type or member is obsolete
 
         IActorRef IInternalActorRef.GetChild(IReadOnlyList<string> name)
         {

src/core/Akka/Dispatch/AbstractDispatcher.cs

@@ -389,7 +389,9 @@ internal static void PrintActors()
                     Console.WriteLine("{0} inhabitants {1}", dispatcher, dispatcher.Inhabitants);
                     foreach (var actor in a)
                     {
+#pragma warning disable CS0618 // Type or member is obsolete
                         var status = actor.IsTerminated ? "(terminated)" : "(active)";
+#pragma warning restore CS0618 // Type or member is obsolete
                         var messages = actor is ActorRefWithCell
                             ? " " + actor.AsInstanceOf<ActorRefWithCell>().Underlying.NumberOfMessages + " messages"
                             : " " + actor.GetType();