[PATCH] CI: put back lost nt4 target to gitlab CI

[Andreas Schneider]

On Tuesday, 22 January 2019 15:03:31 CET Ralph Böhme via samba-technical 
wrote:
> Hi folks,
> 
> I noticed that the nt4_dc and member envs have been lost from the
> .gitlab*.yml config files in the recent Python reshuffling. The attached
> patch puts it back in.
> 
> I've added it to the public runners as it doesn't run overly long.
> 
> Please review&push if happy. Thanks!

RB+ and pushed to autobuild