Adding remark for deploy-openstack-compute

The patch adds notice regarding the pipeline is not
production ready yet and cannot be used for it.

Change-Id: I6ec1a386a66b16682cd81f830989832bbd1cd30d
Related-PROD: PROD-25551 (PROD:25551)
(cherry picked from commit c917945f76980a6a32909035c11fab58782070ee)
1 file changed