DS install: fix DS asking for NSS pin during install
    
    DS now comes with nsslapd-security turned on and its own CA
    cert in its NSS database. We're re-setting the NSS database
    and setting our own CA cert to it, the DS pin file therefore
    needs to be updated with the new password after this reset.
    
    Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>