Add list backups with details for backup:backup_project_attribute

This patchset adds an RBAC test for validating that
"backup:backup_project_attribute" is included in response body
for listing backups with details following successful policy
authorization. The policy in code documentation indicates that
this API enforces this policy [0] and the policy is enforced in
the code here [1]. The expected attribute comes from [2].

[0] https://github.com/openstack/cinder/blob/8f7bc140052091d141e2cf436e989aa2d15dd6f4/cinder/api/v3/backups.py#L89
[1] https://github.com/openstack/cinder/blob/8f7bc140052091d141e2cf436e989aa2d15dd6f4/cinder/policies/backups.py#L57
[2] https://github.com/openstack/cinder/blob/8f7bc140052091d141e2cf436e989aa2d15dd6f4/cinder/api/v3/backups.py#L64

Change-Id: I8285b25b97de90e1911adf5e97ffd051d10adf90
1 file changed