media size criteria change proposal

[Kamil Paral]

This is related to KDE Live being oversize at Beta:
https://bugzilla.redhat.com/show_bug.cgi?id=1561763
which should have been a blocker, but it was agreed that we will change
criteria instead. Here's a proposal for that change.

Instead of current Beta criterion:
"The release-blocking images must meet current size requirements."
https://fedoraproject.org/wiki/Fedora_28_Beta_Release_Criteria#image-size...

I propose to move that criterion to Final milestone instead, and use this
wording:
"The release-blocking images must meet current size requirements, as
documented at [Releases/28/ReleaseBlocking][1]." (the release number will
of course change in time)

I chose [1] over [2], because [1] contains all important release-blocking
images (distinguished to individual .iso or .img level), while [2] only
contains spins and nothing else. In [1], we will add a new column labeled
"target size" and fill it out. It is enough to fill it out just for images
marked as release blocking. The nice thing is that in that table you can
easily see who is responsible for that image, and so it's clear who's
responsible for keeping the target size up-to-date (and also whom to ping
if it isn't).

The reason to move this criterion to Final is that we no longer block on
optical images for Beta (that's quite a recent change), and with flash
drives you can always get a larger flash drive to fit the image on. So it's
no longer necessary to insist on perfect size for Beta. And being oversize
is honestly just a minor problem.

Note that I haven't proposed any particular sizes for any particular
images. I believe that should be all the responsibility and decision of the
owning group (or perhaps FESCo, for some generic images), not QA.

Thoughts?


[1] https://fedoraproject.org/wiki/Releases/28/ReleaseBlocking
[2] https://fedoraproject.org/wiki/Releases/28/Spins