Distribute shared secret to kubelet and apiserver

Generate a token for kubelet to use to authenticate to apiserver.
Distribute that token in a file to kubelet using salt.
Pass a flag to the kubelet telling it where to find a token, using salt.
Distribute that token in a file to kubelet using salt.
Pass a flag to apiserver telling it where to find a file full of known tokens.
Distribute list of known tokens (currently 1) to apiserver.