add Keystone region configuration

Change-Id: Icda5d46c296fcb2f7599dc9957baf15dd0925c54
diff --git a/tests/pillar/control_single.sls b/tests/pillar/control_single.sls
index 5b9c1bd..d9d6a73 100644
--- a/tests/pillar/control_single.sls
+++ b/tests/pillar/control_single.sls
@@ -14,6 +14,7 @@
     identity:
       engine: keystone
       host: 127.0.0.1
+      region: RegionOne
       port: 35357
       tenant: service
       user: cinder