fix(mimir): correct mimir datasource settings for grafana

charts/incubator/mimir/Chart.yaml

@@ -39,4 +39,4 @@ name: mimir
 sources:
   - https://grafana.com
 type: application
-version: 0.1.6
+version: 0.1.8

charts/incubator/mimir/values.yaml

@@ -43,6 +43,9 @@ configmap:
             {{- if .Values.grafana.datasource.timeout }}
             timeout: {{ .Values.grafana.datasource.timeout }}
             {{- end }}
+            httpHeaderName1: 'X-Scope-OrgID'
+          secureJsonData:
+            httpHeaderValue1: 'metamonitoring'
 
 grafana:
   datasource:
@@ -241,4 +244,4 @@ mimir:
         memory: 731Mi
       requests:
         cpu: 20m
-        memory: 10Mi
+        memory: 10Mi