Add the ability for AmqpContext to utilize randomly generated queue names by updating the queue name.

[avatarofhope2]

The queue name could have been entered as empty string, and come out in a format similar to: amq.gen-LQTh8IdojOCrvOnEuFog8w. The format of the automatically generated name is not in the spec, but the automatic generation is part of the amqp specification: https://www.rabbitmq.com/resources/specs/amqp0-9-1.xml (see methods declare and declare-ok)