Ticket 47704 - invalid sizelimits in aci group evaluation
Bug Description: aci group evaluation fails because of sizelimit exceeded
but it is exceeded because it is -1476887876 or another
negative integer becasue operation parameter are a union
based on operation types and so for otehr than search
the value is dependent on the operation params
Fix Description: treat any negative integer like -1 (unlimited). A better fix
would be to introduce a specific configuration param or
to abondon the limit in group evaluation at all. But this
could introduce backward compatibility problems and
will be handled in ticket 47703 for newer versions
https://fedorahosted.org/389/ticket/47704
Reviewed by: Rich, thanks