Set os_region_name for cinder

Region name should be set to nova.conf and cinder.conf so that
cinder volume can work in multiregion env.

Closes-Bug: #1429738
Change-Id: Ib20911c24d8daabc07e6515f4a23a745d77593ff
diff --git a/lib/nova b/lib/nova
index e9e78c7..199daee 100644
--- a/lib/nova
+++ b/lib/nova
@@ -544,6 +544,8 @@
     iniset $NOVA_CONF DEFAULT ec2_workers "$API_WORKERS"
     iniset $NOVA_CONF DEFAULT metadata_workers "$API_WORKERS"
 
+    iniset $NOVA_CONF cinder os_region_name "$REGION_NAME"
+
     if [[ "$NOVA_BACKEND" == "LVM" ]]; then
         iniset $NOVA_CONF libvirt images_type "lvm"
         iniset $NOVA_CONF libvirt images_volume_group $DEFAULT_VOLUME_GROUP_NAME