Some preset files may be installed when actual services are already
enabled/disabled. To not worry about package installation order, simply
reset all the services to default state when all the packages are
installed.
FixesQubesOS/qubes-issues#2049
Anaconda/pungi doesn't support multiple versions of the same package at
the time, so place all kernels on installation media in separate
directory and install them in %post script.
InstallClass.postAction isn't called from anywhere, move things to
anaconda post-scripts. Add regenerate of initramfs image to include
qubes-pciback module.
