docker-host: Add cryptsetup
    
    Originally, not including cryptsetup is mostly attributed to it not
    being in the critical path (or a hard dependency).  But I think there
    are many valid reasons to fulldisk encrypt container compute nodes,
    such as ensuring any private data in `/etc` or Docker volumes doesn't
    leak out.
    
    See: https://lists.projectatomic.io/projectatomic-archives/atomic-devel/2016-January/msg00038.html
    and: https://bugzilla.redhat.com/show_bug.cgi?id=1270335