Add enforce_scope setting support for Cinder

Conder started moving to new RBAC and cinder-tempest-plugin
and Tempest need to set few configuration to enable the
scope checks on cinder side and on Temepst side to tell
cinder is all configured with scope checks and test can be run with
scoped token.

Change-Id: Ic7cd919c000c4e7b9a3a06638a5bd87b1617e749
2 files changed