Merge changes I1efdc490,I220d90d3,I405f09f7,I392b2ddf,I84062d6e

* changes:
  Relabel the instance label for prometheus and loki metrics
  Add dashboard for Loki metrics
  Add dashboard to monitor Prometheus data
  Only show Gerrit instances in the instance dropdowns
  Create a configmap per dashboard
diff --git a/charts/grafana/grafana.yaml b/charts/grafana/grafana.yaml
index 192dc47..64b54de 100644
--- a/charts/grafana/grafana.yaml
+++ b/charts/grafana/grafana.yaml
@@ -308,6 +308,8 @@
       url: #@ "http://loki-{}.{}.svc.cluster.local:3100".format(data.values.namespace, data.values.namespace)
       access: proxy
       isDefault: false
+      jsonData:
+        maxLines: 10000
     - name: LokiPromQL
       type: prometheus
       url: #@ "http://loki-{}.{}.svc.cluster.local:3100/loki".format(data.values.namespace, data.values.namespace)