Add Glance support

Glance support in Cinder is used to convert images into volumes
or send volumes into Glance with the goal to boot virtual machines
from volumes.

Change-Id: Ie2c9ed382254e374d12242edc7d57077fbbcd240
Signed-off-by: Emilien Macchi <emilien.macchi@enovance.com>
Merge "Add Glance support"