Today, if a job is aborted, zuul will launch said job until success /
failure. If the job continues to abort, it will loop forever. As a
result, we now added the ability to limit this. By default we'll try
to relaunch an aborted job a total of 3 times, before RETRY_LIMIT is
returned as the result.
Change-Id: Ie26fdc29c07430ebfb3df8be8ac1786d63d7e0fe
Signed-off-by: Paul Belanger <pabelanger@redhat.com>