fix CHANGE_MINIKUBE_NONE_USER regression from recent changes

[steved]

6c48048 changed the order of the startup script so that now the CHANGE_MINIKUBE_NONE_USER chown doesn't actually kick in after the files are added. I didn't re-add it exactly where it was before (right before bootstrapCluster), but after the provisioning is complete.

I believe #3751 is this issue, as well.

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