Specify default exchange type correctly to not confuse people
Specify default exchange type correctly to not confuse people

RabbitMQ won't let us redefine predefined exchanges like the default one or amq.topic. So
Hot Bunnies does not declare exchanges when the name equals "". But HotBunnies::Exchange instance
type with current code will still be off and cause confusion.

noahhaon/march_hare,ruby-amqp/march_hare,noahhaon/march_hare,ruby-amqp/march_hare