This value is set in the worker config. In future it might also be
passed through the api to upload into target accounts, but it should
never be set in composer.
When a test script fails in CI, it's often difficult to pinpoint the
exact line in the log where the script failed and the cleanup() function
(trapped on EXIT) begins.
Adding a prominent line (with greenprint where available) at the start
of the cleanup function will make reading logs of failed jobs a lot
easier.
This will allow us to use the service accounts which work against
identity.api.openshift.com. These are much easier to manage, especially
with the new multi-tenancy, as there's a single page to create/expire
them across an account.
They also have the added benefit of not expiring automatically when
they're not used like offline tokens, and immediate expiration when
desired.
