A long time ago the driver was changed to store volume_id
in the nova database and use that. Previously it would use the
volume_name and make a call to get the volume_id.
Both should be supported, but as the code path currently throws
a KeyError it will never reach the backwards compatible code.
This makes sure that the driver works even after an upgrade from Mitaka.
Depends-On: https://review.openstack.org/#/c/643130/
Change-Id: Iab6a3ca6bf92dc5606c7723dc6c62bf07fa1d934
Closes-Bug: #1648629
05b6c9f9fa