This change is the first step to support secure RBAC and allows usage
of system scope credentials for Keystone API request.
This change covers the following two items.
- assignment of system scope roles to system user
- credential parameters for authtoken middleware
Note that the credential parameters for authtoken middleware are
used in some providers, and these providers still require a project
scope credential. This will be fixed by the subsequent change.
Depends-on: https://review.opendev.org/804325
Change-Id: I8b73f04bd10d0129c7437c6f9c6a436b6171f39d
a528fe3c4e