Revert K8S to a storage media type of json
Revert K8S to a storage media type of json

With the default value (protobuf), the kubernetes api server will sit
in a (slow) restart loop when multimaster is enabled, logging a stacktrace
and then restarting. This will manifest as, most commonly, "Unable to
connect to the server: unexpected EOF" from kubectl. This will break
bootstrap as we need to talk to K8S API to deploy dex, kube-dns, and
tiller.

bsc#1063235
bsc#1063285
bsc#1063543

kubic-project/salt,ereslibre/salt,ereslibre/salt,kubic-project/salt,ereslibre/salt,kubic-project/salt