Dont override auth_url unless necessary. Fixes Rackspace driver
Dont override auth_url unless necessary. Fixes Rackspace driver

andrewsomething/libcloud,mistio/libcloud,apache/libcloud,Kami/libcloud,apache/libcloud,andrewsomething/libcloud,mistio/libcloud,Kami/libcloud,Kami/libcloud,andrewsomething/libcloud,apache/libcloud,mistio/libcloud