feat: update keystone-rxt to use the new rxt role (#6)
This change makes it possible to run the keystone rxt plugin in
an environment using the os_flex attribute.
This change includes
* multi-account detection and autoprovisioning
* new mapping defaults for scheme version 2.0
Two new options have been added to support the creation of the
role attribute methods, allowing a user to be a member of more
than one project.
[rackspace]
role_attribute_enforcement <BOOL>
role_attribute <STR>
Signed-off-by: Kevin Carter <[email protected]>
