cinder-keystone-setup should be removed

[Steven Hardy]

The cinder-keystone-setup script is a legacy from back when we had a script to install openstack (as opposed to relying on devstack), so it should be removed.

Here's the commit which added it (Back in grizzly):

https://review.openstack.org/#/c/21026/

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/125615

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/125615
Committed: https://git.openstack.org/cgit/openstack/heat/commit/?id=4a461038a4d28fd3a540730f03cbe185c926e8fa
Submitter: Jenkins
Branch: master

commit 4a461038a4d28fd3a540730f03cbe185c926e8fa
Author: Steven Hardy <email address hidden>
Date: Thu Oct 2 13:39:56 2014 +0100

    Remove cinder-keystone-setup script

    This is a legacy script from the tools/openstack days, so we don't
    need it now as that script no longer exists.

    Change-Id: Iddcd76739447e65fcbf4f4bac517cf4fd919fac9
    Closes-Bug: #1376712