Use template functions to quote env vars

This allows helm to intelligently quote env var values, e.g. in order to pass json arrays as values

helm-chart/eoapi/templates/services/configmap.yaml

@@ -7,7 +7,7 @@ metadata:
   name: {{ $serviceName }}-envvar-configmap-{{ $.Release.Name }}
 data:
   {{- range $envKey, $envValue := index $v "settings" "envVars" }}
-  {{ upper $envKey }}: "{{ $envValue }}"
+  {{ upper $envKey }}: {{ $envValue | quote }}
   {{- end }}
 ---
 {{/* END: if index $v "enabled" */}}