distributor when running on same machines with workers

http://tech.groups.yahoo.com/group/nservicebus/message/17197

* it also helps during deployments - to make workers go to idle before reconfiguring service with new set of binaries.
* this type of infrastructure are intermediate steps when we scale out.  We start all projects with a basic distributor per module initially.  


The current approach changes the endpoint name of the worker when I've explicitly set  DefineEndpointName.


The changeset removes the specific line causing a random guid being appended when enlisting the worker to the distributor.