The Cloud Queues provider for Rackspace UK.

https://issues.apache.org/jira/browse/JCLOUDS-340

Can we get this in for 1.7.0?

To run live tests:

    mvn -Plive -Dtest.rackspace-cloudqueues-uk.identity=[username] -Dtest.rackspace-cloudqueues-uk.credential=[apikey] clean install