concourse: consume local-users from k8s secret (#8099)

instead of directly from helm chart. k8s secret will use the chart value
 as a default, so functionality is not lost

Signed-off-by: Chris Hiestand <chrishiestand@gmail.com>

stable/concourse/Chart.yaml

@@ -1,5 +1,5 @@
 name: concourse
-version: 2.1.0
+version: 2.1.1
 appVersion: 4.2.1
 description: Concourse is a simple and scalable CI system.
 icon: https://avatars1.githubusercontent.com/u/7809479

stable/concourse/templates/web-deployment.yaml

@@ -49,7 +49,10 @@ spec:
             {{- end }}
             {{- if .Values.concourse.web.localAuth.enabled }}
             - name: CONCOURSE_ADD_LOCAL_USER
-              value: {{ .Values.secrets.localUsers | quote }}
+              valueFrom:
+                secretKeyRef:
+                  name: {{ template "concourse.concourse.fullname" . }}
+                  key: local-users
             {{- end }}
             {{- if .Values.concourse.web.tlsBindPort }}
             - name: CONCOURSE_TLS_BIND_PORT