Ticket 28 - Change default objectClasses for users and groups
    
    Bug Description:  Previously we had to use inetUser on users
    for memberOf, and no option existed for groups.
    
    Fix Description:  With the addition of nsMemberOf we can support users
    and groups with this objectClass. As well, it allows us to remove
    inetUser because it's attributes are supplied by the other classes
    on the object.
    
    https://pagure.io/lib389/issue/28
    
    Author: wibrown
    
    Review by: mreynolds (Thanks!)