config.tf: bump operator images
config.tf: bump operator images

This removes a number of Container Linux specifics including the
following:

 - explicitly depend on docker.service when needed
 - remove unnecessary quotes from etcd TLS service
 - update the certificate location from /usr/share to /etc/ssl
 - change etcd-member to be a simple systemd service instead of notify

derekhiggins/installer,derekhiggins/installer