Ticket #48285 - The dirsrv user/group should be created in rpm %pre, and ideally with fixed uid/gid
    
    Description: Adding user dirsrv (uid 389) and group dirsrv (gid 389)
    if they do not exist.  If the uid and the gid are in use, increase
    one by one and find unused id for them.  If they exists, no change
    is made.  The default user and group pair (nobody, nobody) is also
    replaced with (dirsrv, dirsrv).
    
    https://fedorahosted.org/389/ticket/48285
    
    Reviewed by wibrown@redhat.com (Thank you, William!)