Configure cinder service token

Glance is implementing new location APIs, for which, cinder needs
to pass service token to register a location in glance.
This is required in the case when glance is using cinder as a backend
and cinder tries to upload a volume in the optimized path.

We are adding a new option, ``CINDER_USE_SERVICE_TOKEN`` that will
configure the service user section in cinder.conf. By default, it
is set to False.

Change-Id: I0045539f1e31a6d26c4f31935c5ddfaaa7607a48
1 file changed