The addition of the "super-admin.conf" functionality required
init.go's Client() to create RBAC rules on its first creation.
However this created a problem with the "wait-control-plane" phase
of "kubeadm init" where a client is needed to connect to the
API server Discovery API's "/healthz" endpoint. The logic that ensures
the RBAC became the step where the API server wait was polled for.
To avoid this, introduce a new InitData function ClientWithoutBootstrap.
In "wait-control-plane" use this client, which has no permissions
(anonymous), but is sufficient to connect to the "/healthz".
Pending changes here would be:
- Stop using the "/healthz", instead a regular REST client from
the kubelet cert/key can be constructed.
- Make the wait for kubelet / API server linear (not in go routines).
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