Expose amqp_channel and amqp_deliveryTag headers in case message conversion fails

[ekazakas]

Enhancement

Would it be possible to expose amqp_channel and amqp_deliveryTag headers to ErrorMessage in case message conversion fails?

This could be useful in scenarios when inbound adapter is configured with acknowledge mode = MANUAL.

At the moment these headers are only attached on Message, but since the conversion fails we don't have the Message object. And now it's impossible to reject the message anymore, since there is no way to track down the channel.

A workarround solution is to do message conversion in a transformer.

[garyrussell]

See https://stackoverflow.com/questions/54439916/how-to-handle-errors-after-message-has-been-handed-off-to-queuechannel/54442657#54442657

Moving this to spring-integration.