This fixes possible problems when kubeadm upgrade can't load the
InitConfig properly. Some new code introduced in
https://github.com/kubernetes/kubernetes/pull/75499 is placed between
the loading of the config and the error handling, hiding possible
errors.
This error cannot be ignored (as is the case now), since the cfg ptr.
returned from the configutil function will be nil in the case of an
error.
Signed-off-by: Odin Ugedal <odin@ugedal.com>
2fc9b3a670