Comment # 3 on bug 1035062 from Thomas Blume

(In reply to Ruediger Oertel from comment #2)
> actually I just ran into the same issue breaking the OBS buildservice worker
> images. but the bug is for systemd I guess ...

systemd version 232 has a special generator (systemd-sysv-generator) that
converst the init scripts to systemd service units.
They are located below: /run/systemd/generator.late/

Checked via installing named on tumbleweed VERSION="20170328" 
It seems to work correctly:

-->
# ll /run/systemd/generator.late/ | grep named
-rw-r--r-- 1 root root 558 21. Apr 14:09 named.service
--<

Can you see the named.service file?
If so, does it work if you run:

systemctl enable named.service

and reboot?