Fedora seeded installation media URL is wrong
Since Fedora 22, Fedora offers several flavors of its distribution. See them at http://dl.fedoraproject.org/pub/fedora/linux/releases/22/
The old installation media URL that we seed doesn't cover this and 404s. I chose to substitute it by Server.
Maybe we should have 'Fedora pets' (Server) and 'Fedora cattle' (Cloud) :)