[ID-433] Dockerize

1) Fix a weird issue where we didn't use :zone to delete VMS... which, of course, meant that we couldn't delete VMs. (This was a new feature as of last week, but we should have caught that in the previous PR.)

2) Dockerized kitchen-cleaner
We should do a `yum clean all` here to reduce layer size. Also, might be worth adjusting the spacing with the escape characters like we did in `lakitu`