Reverting "Python 3 Migration Improvements" Change

[Kevin Kofler]

Bohuslav Kabrda wrote:
> I have to inform you that I had to revert the "Python 3 Migration
> Improvements" change for F22 - more precisely, its parts that would've
> caused both Python 2 and Python 3 being on atomic host or minimal cloud
> image. The reason is mentioned in [1] - in short, policycoreutils-python3
> has only partial functionality compared to policycoreutils-python, which I
> didn't understand from my communication with its maintainers previously.

So we're stuck on an obsolete Python because of SELinux, grrr!

        Kevin Kofler