No need to set an exception when a channel shutdown was explicitly requested

Author: lukebakken

projects/RabbitMQ.Client/client/impl/AsyncRpcContinuations.cs

@@ -68,7 +68,10 @@ public AsyncRpcContinuation(TimeSpan continuationTimeout)
         // What to do if setting a result fails?
         public abstract void HandleCommand(in IncomingCommand cmd);
 
-        public void HandleChannelShutdown(ShutdownEventArgs reason) => _tcs.SetException(new OperationInterruptedException(reason));
+        public virtual void HandleChannelShutdown(ShutdownEventArgs reason)
+        {
+            _tcs.SetException(new OperationInterruptedException(reason));
+        }
 
         protected virtual void Dispose(bool disposing)
         {
@@ -258,6 +261,11 @@ public ChannelCloseAsyncRpcContinuation(TimeSpan continuationTimeout)
         {
         }
 
+        public override void HandleChannelShutdown(ShutdownEventArgs reason)
+        {
+            // Nothing to do here!
+        }
+
         public void OnConnectionShutdown(object sender, ShutdownEventArgs reason)
         {
             _tcs.TrySetResult(true);