Define default opencontrail parameters

Related-PROD: PROD-29523 (PROD:29523)

(cherry picked from commit 3cb553c41c48da32360a38ccd2946458ad2a18cc)
Change-Id: Iadb3dcbab17dc4230d3d4d4f06310ce46037a410
diff --git a/defaults/openstack/init.yml b/defaults/openstack/init.yml
index 44b334b..cc62919 100644
--- a/defaults/openstack/init.yml
+++ b/defaults/openstack/init.yml
@@ -17,6 +17,7 @@
     openstack_upgrade_enabled: False
     openstack_telemetry_redis_db: '0'
     openstack_telemetry_redis_sentinel_mastername: 'master_1'
+    openstack_region: RegionOne
     # SSL
     ceilometer_agent_ssl_enabled: False
     openstack_mysql_x509_enabled: False