Commits on Nov 23, 2021

1. ValidateName always prints empty string as value instead of actual value …

   This commit fixes an rather annoying issue where `ValidateName` does not
   print the correct value of the invalid cluster name which made the issue
   hard to debug.
   
   Background:
   I recently upgraded from an earlier KubeOne version to master and my cluster-name contained dots (`.`).
   However since kubermatic#1641 this is no longer valid.
   
   The output of this validation looked like
   
   ```bash
   $ kubeone apply --manifest kubeone.yaml --credentials credentials.yaml --tfjson output.json --auto-approve --verbose
   
   Error: failed to initialize State: failed to build state: failed to load cluster: unable to load a given KubeOneCluster object: unable to validate the given KubeOneCluster object: name: Invalid value: "": .name should be lowercase and can only contain alphanumeric characters and hyphens(-)
   ```
   
   With this commit in place the output looks like this:
   
   ```bash
   $ kubeone install --manifest kubeone.yaml --credentials credentials.yaml --tfjson output.json --verbose
   Error: failed to initialize State: failed to build state: failed to load cluster: unable to load a given KubeOneCluster object: unable to validate the given KubeOneCluster object: name: Invalid value: "k8s.cedi.dev": .name should be lowercase and can only contain alphanumeric characters and hyphens(-)
   ```
   
   Signed-off-by: Cedric Kienzler <github@cedric-kienzler.de>

   Cedric Kienzler committed Nov 23, 2021
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