We want to swap in emergency situations so we have some time to recover

On never kernels, a swappiness of 0 means "disable swap completely"
where it would before ~ 2.6.32 would still allow the kernel to swap
in certain emergency situations.

We have alerting in place in case of any swapping, hoping we can react
quickly enough to catch problems of runaway machines before they have
to haywire OOM or reboot.

Command: `rg -l swappiness | xargs sed -i 's/swappiness" = 0/swappiness" = 1/'`
(but not adding the change to the virtual hardware for the local grid).