The upstream kubernetes devs are mostly now referring to the "master" as the "control plane" node. It is still called master in the API for purposes of the node taints (and probably will be for the foreseeable future), but continuing my effort to remove the terms master and slave where we can get away with it, we could follow suit and deploy the new cluster (when it is ready), using the name "tools-k8s-control-01/2/3" instead since we are replacing the nodes anyway.

This is just to bring it up for discussion, and if accepted, update docs once we are ready to deploy.