Fix region for glance,manila,heat

Change-Id: I50a670ec5c0fcc097893552f151b837426e6a738
diff --git a/heat/server/single.yml b/heat/server/single.yml
index cd548bf..0c83206 100644
--- a/heat/server/single.yml
+++ b/heat/server/single.yml
@@ -9,6 +9,7 @@
           version: latest
   heat:
     server:
+      region: ${_param:openstack_region}
       stack_domain_admin:
         name: heat_domain_admin
         password: ${_param:heat_domain_admin_password}