Add enforce_scope setting support for keystone

Keystone-tempest-plugin has implemented the secure RBAC
tests and enabling the enforce_scope via keystone devstack
plugin. Doing those setting in devstack will help to manage
easily and in central place also avoid restarting the api
service.

Change-Id: I30da189474476d3397152a0a15c2e30a62d712ad
2 files changed