"backup_gigabytes" and "per_volume_gigabytes" parameters
are supported in api v2, they aren't mentioned in api v2
document[1]. On the other hand both of them are mentioned
in api v3 document[2].
[1] https://developer.openstack.org/api-ref/block-storage/
v2/index.html#update-quotas
[2] https://developer.openstack.org/api-ref/block-storage/
v3/index.html?highlight=backup_gigabytes#update-quotas
-for-a-project
Change-Id: I135efd5c2b4735f5821922643926390976453bf5
Closes-bug: #1727631
8ee82f04e6