Ticket 48931 - start-ds-admin should use systemctl
    
    Bug Description:  Due to the design of start-ds-admin, it can be annoying
    to get selinux policy to work with this. We should use systemctl when avaliable
    to correctly have our admin process labeled.
    
    Fix Description:  When the configure flag specifies a unit dir, we set a flag
    in the start / stop / restart scripts that uses systemctl instead.
    
    https://fedorahosted.org/389/ticket/48931
    
    Author: wibrown
    
    Review by: mreynolds