Fix the variable used for the service_id of the heat endpoint

Change-Id: I0c8190713722e3bcef19e94629d4f0d4fbfaa8fa
diff --git a/files/keystone_data.sh b/files/keystone_data.sh
index e0d5c63..1754910 100755
--- a/files/keystone_data.sh
+++ b/files/keystone_data.sh
@@ -165,7 +165,7 @@
                            --user_id $HEAT_USER \
                            --role_id $ADMIN_ROLE
     if [[ "$KEYSTONE_CATALOG_BACKEND" = 'sql' ]]; then
-        HEAT_SERVICE=$(get_id keystone service-create \
+        HEAT_CFN_SERVICE=$(get_id keystone service-create \
             --name=heat \
             --type=orchestration \
             --description="Heat Service")