Description of problem:
as per #81487, to implement this correctly, I
need to know the fault code that will be returned
if duplicate uuids are found.
This will be the error return code for the
register.new_system() call with the "rhnuuid"
included in the string.
Code is 105.
Implemented in 2.2.0
Seems to work - we'll find out if we turn this on.