rdr Chart references undocumented "privatekey" Vault secret

[mhjacks]

The cluster_deployments template references a hardcoded secret value which is not documented.

To correct this in the short term, add the following to your values_secret.yaml:

  - name: privatekey
    fields:
      - name: "username"
        value: "any_username"
      - name: "privatekey"
        path: ~/.ssh/private_key_file
      - name: "publickey"
        path: ~/.ssh/public_key_file