The default policy will been replaced with one which aligns with the
Secure-RBAC scopes and roles. Since ironic-inspector is a tool used only
by system-level admins, only the ``system`` scope is supported, and the
only roles in the policy rules are ``admin`` and ``reader``.
The is_admin and is_observer rules are deprecated for removal, and
every rule which refers to them are deprecated in favor of the
system-scoped equivalent (system_scope:all with role:admin or
role:reader)
No unit tests covered the existing policy, these are now covered by
test_acl.TestACLDeprecated.
Change-Id: I4d038245c6b97b1504fb47eeec78ad3f9e5a897c
c9e312f8b4