It is necessary for a standard set of groups to be created for a
new user, and not just one 'users' group. These groups are tied
to polkit rules.

Use full PATH, because otherwise extra modules with the same
endings are packed.
Instead of listing modules from the same directory, the path
to the directory is used.
The 10-stage2 list has been cleaned up, but still has a lot
of redundancy. Need added some basic lists for all targets.

- kwrk: exclude flatpak-repo-flathub from livecd because fake initializing of flatpak directory tree