Enable test_secret_stores tests

This patch enables test_secret_stores tests in the SRBAC job. The tests
were previously fixed in this patch [1].

This change builds on the fix. It modifies the configuration of
the SRBAC job so that it is deployed with enabled multiple secret
stores.

[1] https://review.opendev.org/c/openstack/barbican-tempest-plugin/+/883482

Change-Id: I60305a35528fd16ac4e995d11d6d0999a6440e44
diff --git a/.zuul.yaml b/.zuul.yaml
index d60cc74..20f9f31 100644
--- a/.zuul.yaml
+++ b/.zuul.yaml
@@ -128,12 +128,21 @@
             oslo_policy:
               enforce_new_defaults: True
               enforce_scope: True
+            secretstore:
+              enable_multiple_secret_stores: True
+              stores_lookup_suffix: simple_crypto
+            secretstore:simple_crypto:
+              secret_store_plugin: store_crypto
+              crypto_plugin: simple_crypto
+              global_default: true
         test-config:
           $TEMPEST_CONFIG:
             auth:
               tempest_roles: member
             barbican_rbac_scope_verification:
               enforce_scope: True
+            barbican_tempest:
+              enable_multiple_secret_stores: True
 
 - job:
     name: barbican-tempest-plugin-simple-crypto-secure-rbac-yoga