Don't pass empty computer-ou to net command
Don't pass empty computer-ou to net command

When computer-ou argument is empty, don't build a createcomputer=
argument for 'net ads join' with nothing in it. Just skip.

https://bugs.freedesktop.org/show_bug.cgi?id=56162

freedesktop-unofficial-mirror/realmd__realmd,freedesktop-unofficial-mirror/realmd__realmd,freedesktop-unofficial-mirror/realmd__realmd,freedesktop-unofficial-mirror/realmd__realmd