Fix ShutdownInitiator in CloseAsync

`AutorecoveringChannel` `CloseAsync` should just call `_innerChannel.CloseAsync`

Author: lukebakken

Diff for: projects/RabbitMQ.Client/client/impl/AutorecoveringChannel.cs

@@ -204,8 +204,7 @@ public Task CloseAsync(ushort replyCode, string replyText, bool abort,
             CancellationToken cancellationToken)
         {
             ThrowIfDisposed();
-            var args = new ShutdownEventArgs(ShutdownInitiator.Library, replyCode, replyText);
-            return CloseAsync(args, abort, cancellationToken);
+            return _innerChannel.CloseAsync(replyCode, replyText, abort, cancellationToken);
         }
 
         public async Task CloseAsync(ShutdownEventArgs args, bool abort,

Diff for: projects/Test/Applications/MassPublish/Program.cs

@@ -156,6 +156,7 @@ await publishChannel.BasicPublishAsync(exchange: ExchangeName, routingKey: Routi
             }
 
             await consumeChannel.CloseAsync();
+            await consumeConnection.CloseAsync();
         }
 
         private static void PublishChannel_BasicNacks(object sender, BasicNackEventArgs e)