Cinder reads non-Kolla generated config files

The RDO packages do something wierd about reading files from
/usr/share/cinder/cinder-dist.conf by default.  These files contain
non-Kolla configured configuration values.  This is obviously not
ideal since RDO policies may be different then Kolla policies.

This should probably be fixed across the source base, but for the
moment it is blocking correct operation of Cinder.

Change-Id: I823a90b28eaaf5474334885a45f22ed28537b24b
Closes-Bug: #1487799