[heat] Multi-region support for bootstrap

When bootstrapping, Heat was not setting a region explicitly, so it
could default to a region other than the one being deployed.

Change-Id: I0a0596a020fbff91ccc5b9f44f271eab220c88cd

ansible/roles/heat/tasks/bootstrap_service.yml

@@ -15,6 +15,7 @@
       OS_USERNAME: "{{ openstack_auth.username }}"
       OS_PASSWORD: "{{ openstack_auth.password }}"
       OS_PROJECT_NAME: "{{ openstack_auth.project_name }}"
+      OS_REGION_NAME: "{{ openstack_region_name }}"
       HEAT_DOMAIN_ADMIN_PASSWORD: "{{ heat_domain_admin_password }}"
     image: "{{ heat_api.image }}"
     labels: