[PATCH] Fix %G substitution in AD member environment

[Christian Ambach]

Hi Andreas,

Am 20.09.16 um 10:20 schrieb Andreas Schneider:
> 
> https://bugzilla.samba.org/show_bug.cgi?id=12276
> 
> Please review and push if OK.

This area of the code seems to be very fragile and sensitive to
regressions. Can you please add some tests to make sure we do not break
this again?

Cheers,
Christian