title: 'Unexpected Exception' after upgrading EasyNetQ 3.4.5 to Latest 6.3.1
body: <p>After upgrading the EasyNetQ package to 6.3.1 I get the below error. Code was running on version 3.4.5</p>
  <pre><code>The AMQP operation was interrupted: AMQP close-reason, initiated by Library, code=541, text='Unexpected Exception', classId=0, methodId=0, cause=System.IO.IOException: Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host. ---&gt; System.Net.Sockets.SocketException: An existing connection was forcibly closed by the remote host
     at System.Net.Sockets.Socket.Receive(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags)
     at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size)
     --- End of inner exception stack trace ---
     at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size)
     at System.IO.BufferedStream.ReadByte()
     at RabbitMQ.Client.Impl.InboundFrame.ReadFrom(Stream reader, Byte[] frameHeaderBuffer) in /_/projects/RabbitMQ.Client/client/impl/Frame.cs:line 222
     at RabbitMQ.Client.Impl.SocketFrameHandler.ReadFrame() in /_/projects/RabbitMQ.Client/client/impl/SocketFrameHandler.cs:line 220
     at RabbitMQ.Client.Framing.Impl.Connection.MainLoopIteration() in /_/projects/RabbitMQ.Client/client/impl/Connection.cs:line 557
     at RabbitMQ.Client.Framing.Impl.Connection.MainLoop() in /_/projects/RabbitMQ.Client/client/impl/Connection.cs:line 499
  </code></pre>
  <p>Code errors on line <code>autoSubscriber.Subscribe(new []{ assembly });</code> below.</p>
  <pre><code>var autoSubscriber = new AutoSubscriber(_bus, &quot;Workers&quot;)
              {
                  AutoSubscriberMessageDispatcher = _dispatcher
              };
              var assembly = GetType().Assembly;
  
              autoSubscriber.Subscribe(new []{ assembly });
  </code></pre>
  <p>I have checked the RabbitMQ management portal and there aren't any connections.
  My connection string is <code>host=localhost;virtualHost=DEV</code></p>