The function validateKubeConfig() can end up comparing
a user generated kubeconfig to a kubeconfig generated by kubeadm.
If a user kubeconfig has a CA that is base64 encoded with whitespace,
if said kubeconfig is loaded using clientcmd.LoadFromFile()
the CertificateAuthorityData bytes will be decoded from base64
and placed in the v1.Config raw. On the other hand a kubeconfig
generated by kubeadm will have the ca.crt parsed to a Certificate
object with whitespace ignored in the PEM input.
Make sure that validateKubeConfig() tolerates whitespace differences
when comparing CertificateAuthorityData.
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