Nightly publisher is broken
Nightly publisher is currently broken, this has caused some of the oVirt snapshot repos to become empty, which in turn caused OST failures, among others.
The error output from the nightly publisher job is as follows:
This is probably caused by YUM metadata that has been placed in the /home/jenkins/artifacts/ovirt-master-snapshot.ready by repoman that had been added in OVIRT-1152.
This as also surfaced another issue - if the *-snapshot.ready directory exists while the nightly publisher job runs (which means the cron job did not finish yet), it will happily move the *-snaphot.tmp directory into it. What it should do instead is wait a while for it to vanish, and then fail if it does not.
Blocking on code review