Policy.json should be defined by user

User can override and add values to policy.json by creating flat
key-value structure under nova:controller:policy.

Change-Id: Ide69691fe5dc4dd684159ad3f29bfeb1638c9bf3
diff --git a/tests/pillar/control_cluster.sls b/tests/pillar/control_cluster.sls
index 163b4e3..84da744 100644
--- a/tests/pillar/control_cluster.sls
+++ b/tests/pillar/control_cluster.sls
@@ -58,4 +58,8 @@
     audit:
       filter_factory: 'keystonemiddleware.audit:filter_factory'
       map_file: '/etc/pycadf/nova_api_audit_map.conf'
+    policy:
+      context_is_admin: 'role:admin or role:administrator'
+      'compute:create': 'rule:admin_or_owner'
+      'compute:create:attach_network':