modifies the accumulator to be a HashMap so be can return the routing key as well
modifies the accumulator to be a HashMap so be can return the routing key as well

Stackato-Apps/RabbitMQSimulator,adrianzhang/RabbitMQSimulator,Stackato-Apps/RabbitMQSimulator,adrianzhang/RabbitMQSimulator,RabbitMQSimulator/RabbitMQSimulator,RabbitMQSimulator/RabbitMQSimulator