With the arrival of Pungi 4, the scheduler is no longer using
fedfind-provided BUILD and FLAVOR values, but ones derived from
Pungi properties. BUILD is now simply the Pungi compose_id.
FLAVOR is produced by joining the Pungi variant, type, and
format with '-' characters as the separators.
Pungi, unfortunately, does not treat 'Rawhide' as a release, it
synthesizes a release number for Rawhide composes and places
that in the compose ID. To cope with that, for now, the
scheduler will set RAWHIDE to '1' if the compose is a Rawhide
one. As we have to adapt all places where we parse the release
in any case, this commit consolidates them into a fedorabase
subroutine.
For the one place where we also used to parse the 'milestone'
from fedfind, there is a placeholder get_milestone subroutine
which currently returns an empty string, as I don't yet have a
good handle on how to draw the kinds of distinctions fedfind
mapped to 'milestone' from Pungi metadata.