Images don't work at all on AWS without cloud-init. Fixes #492
also remote the auth line so that it uses the defaults. Related: rhbz#1628645 Related: rhbz#1628646 Related: rhbz#1628647 Related: rhbz#1628648
This differs from lmc's --make-ami in that creates a full disk image instead of an fsimage. Create a raw disk image with a / and /boot partitions, and enable sshd, chronyd, and cockpit by default.