Code review comment for ~smoser/cloud-init:feature/freebsd-variant

actually, on further thought, lets leve suse out right now.
there is a 'sles' distro (cloudinit/distros/sles.py) but per
 https://github.com/hpcugent/easybuild/wiki/OS_flavor_name_version
we would see 'suse' as the dist.

not sure what the right change is.

i didn't *change* any behavior here i dont think.
so i'd rather leave it is and just enable the freebsd.

and we can/should fix suse/sles later.