These additional settings are required to trigger the job to run when a
GitHub PR gets created or updated. It is also possible to manually run
the job by leaving one of the following comments:
/test ci/centos/containerized-tests
/retest ci/centos/containerized-tests
/test all
/retest all
The 'all' has been added so that future jobs can catch this comment as
well and act on it.
Signed-off-by: Niels de Vos <ndevos@redhat.com>