Add delivery_info to properties for error handler

When handling an error, it would be useful to know the delivery_info such as the routing key. This adds delivery_info to message properties. This seemed the only way to supply the information without changing the error handler contract.

lib/hutch/worker.rb

@@ -74,6 +74,7 @@ def handle_message(consumer, delivery_info, properties, payload)
       @broker.ack(delivery_info.delivery_tag) unless consumer_instance.message_rejected?
     rescue => ex
       acknowledge_error(delivery_info, properties, @broker, ex)
+      properties = Bunny::MessageProperties.new(properties.to_hash.merge(delivery_info: delivery_info))
       handle_error(properties, payload, consumer, ex)
     end