4 Fix the race condition by checking the created_at timestamp and clean up
5 ports that were created at least 30 minutes before.
7 There a race condition in the openstack-cron job that causes the script to
8 delete ports in DOWN state and are still in use by the VM, causing the
11 JSD ISSUE: `RELENG-3062 <https://jira.linuxfoundation.org/browse/RELENG-3062>`_