token.provider.drvier.uuid and token.driver
has been removed from keystone[1].
Devstack has reference/setting of those config
options which is confusing for user and it can
lead to import error like[2]
This commit cleanup the devstack bits of removed
config options.
bp removed-as-of-rocky
[1] https://blueprints.launchpad.net/keystone/+spec/removed-as-of-rocky
[2] http://paste.openstack.org/show/725391/
Change-Id: I29b3b356622c485c4c1046679234a38e7b645071
2742875982