Ticket 51008 - dbhome in containers
    
    Bug Description: When starting 389 in containers, the shm may be too
    small. Mark fixed this in #51007, but it removed the ability to have
    the dbhome in a tmpfs/shm.
    
    Fix Description: Move the request for dbhome/container logic into
    the dscontainer entry point instead to keep the setup.py simpler,
    and make the dbhome in /data/run/dbhome allowing people to use
    an shm for dbhome with '--tmpfs /data/run/dbhome:rw' to a docker
    run or create command.
    
    https://pagure.io/389-ds-base/issue/51008
    
    Author: William Brown <william@blackhats.net.au>
    
    Review by: ???