add 'file' dashboard type logic to grafana deployment volume mounts. fixes #11826. (#11969)

Signed-off-by: Ken Talley <k.talley@gmail.com>

stable/grafana/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v1
 name: grafana
-version: 2.2.1
+version: 2.2.2
 appVersion: 6.0.0
 kubeVersion: "^1.8.0-0"
 description: The leading tool for querying and visualizing time series and metrics.

stable/grafana/templates/deployment.yaml

@@ -152,7 +152,7 @@ spec:
 {{- if .Values.dashboards }}
   {{- range $provider, $dashboards := .Values.dashboards }}
     {{- range $key, $value := $dashboards }}
-      {{- if hasKey $value "json" }}
+      {{- if (or (hasKey $value "json") (hasKey $value "file")) }}
             - name: dashboards-{{ $provider }}
               mountPath: "/var/lib/grafana/dashboards/{{ $provider }}/{{ $key }}.json"
               subPath: "{{ $key }}.json"