provision: No longer use the wheel group in new AD Domains

provision: No longer use the wheel group in new AD Domains

The issue here is that if we set S-1-5-32-544 (administrators) to a
GID only, then users cannot force a mandetory profile to be owned by
administrators (which is a requirement).

There is no particularly useful reason for us to enforce this matching
a system group.

Andrew Bartlett