{{ .Namespace }} is not available in values.yaml.gotmpl

[aweis89]

Use case

We're using the official mysql helm chart in multiple namespaces so to prevent name conflicts, this is working as expected

releases:
- name: {{ .Namespace }}-mysql

However the release name is also used for the svc name so in my application chart values.yaml.gotmpl, we're adding:

- name:  DATABASE_HOST
  value: {{ .Namespace }}-mysql

But that ends up just being -mysql

As a workaround we're using requiredEnv instead and adding the namespace as an env var.

[victornoel]

@aweis89 This is a duplicate of #351