Ticket 48247 - Change the default user to 'dirsrv'
    
    Description:  Change the default user to 'dirsrv' instead of using nobody.
                  Then when we remove the last instance remove the user if
                  lib389 added it.
    
                  Also made some minor fixes.
    
    https://fedorahosted.org/389/ticket/48247
    
    Reviewed by: rmeggins(Thanks!)