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.
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.
Goes with D753 for openqa_fedora_tools.
? for not forgetting changing those.