fixed 'dotnet.exe' process incomplete quit when shutdown application. ( #64 )

Author: yang-xiaodong

src/DotNetCore.CAP.RabbitMQ/RabbitMQConsumerClient.cs

@@ -14,6 +14,7 @@ internal sealed class RabbitMQConsumerClient : IConsumerClient
         private readonly string _queueName;
         private readonly RabbitMQOptions _rabbitMQOptions;
 
+        private IConnection _connection;
         private IModel _channel;
         private ulong _deliveryTag;
 
@@ -57,6 +58,7 @@ public void Listening(TimeSpan timeout, CancellationToken cancellationToken)
                 cancellationToken.ThrowIfCancellationRequested();
                 cancellationToken.WaitHandle.WaitOne(timeout);
             }
+            // ReSharper disable once FunctionNeverReturns
         }
 
         public void Commit()
@@ -72,11 +74,12 @@ public void Reject()
         public void Dispose()
         {
             _channel.Dispose();
+            _connection.Dispose();
         }
 
         private void InitClient()
         {
-            var _connection = _connectionChannelPool.GetConnection();
+            _connection = _connectionChannelPool.GetConnection();
 
             _channel = _connection.CreateModel();