Helm 3: Values.yaml schema validations

[manics]

Helm v3 should support schemas for validating the values file: https://github.com/helm/community/blob/master/helm-v3/001-charts.md#schematized-values-files

If this was added to Z2JH it might help catch simple errors such as typos or changes in property names. E.g.:

• Add information about using NFS with z2jh #421 (comment)
• External services not being passed to hub configuration #1310 (comment)