Enable scope testing for SRBAC

This patch updates the protection (Secure RBAC) job to enable scope
checking.  It also turns on scope checking in Keystone to ensure that
integration is working correctly.

This is the firs step in implementing Phase1 for Cinder [1]

[1] https://governance.openstack.org/tc/goals/selected/consistent-and-secure-rbac.html#phase-1

Change-Id: Id059ab97f099c88aa2a52a29a7de9c8e8676ee85
diff --git a/.zuul.yaml b/.zuul.yaml
index be6d789..a5d34c5 100644
--- a/.zuul.yaml
+++ b/.zuul.yaml
@@ -51,10 +51,13 @@
     vars:
       tox_envlist: all
       tempest_test_regex: 'cinder_tempest_plugin.rbac'
+      devstack_localrc:
+        KEYSTONE_ENFORCE_SCOPE: True
       devstack_local_conf:
         test-config:
           $CINDER_CONF:
             oslo_policy:
+              enforce_scope: True
               enforce_new_defaults: True
           $TEMPEST_CONFIG:
             enforce_scope: