make consul service name configurable
make consul service name configurable

Defaults it to "rabbitmq" so that the default name is DNS-discoverable.

romanek-adam/rabbitmq-autocluster,Stratoscale/rabbitmq-autocluster,linearregression/rabbitmq-autocluster-consul,alanprot/rabbitmq-autocluster,dumbbell/rabbitmq-autocluster,BAM-X/rabbitmq-autocluster,rabbitmq/rabbitmq-autocluster,aweber/rabbitmq-autocluster