[rackspace|queues] Addition of Rackspace Cloud Queues
[rackspace|queues] Fixed some PR comments;  Pass more information to underlying exceptions
[rackspace|queues] Added :rackspace_queues_client_id to tests to make it easier to run; Couple other PR tweaks
[rackspace|queues] fixed broken tests
[rackspace|queueing] Cleaned up tests and authentication logic
Merge pull request #2095 from brianhartsock/rackspace_cloud_queues

[rackspace|queues] Addition of Rackspace Cloud Queues