Unstack graph panels on ceph dashboard

Change-Id: Id0b122c788d573b97d61a01a6c3d2532d168d39f
PROD-related: PROD-32794
diff --git a/ceph/files/grafana_dashboards/pool-overview_prometheus.json b/ceph/files/grafana_dashboards/pool-overview_prometheus.json
index 1d50c9a..cd52bad 100644
--- a/ceph/files/grafana_dashboards/pool-overview_prometheus.json
+++ b/ceph/files/grafana_dashboards/pool-overview_prometheus.json
@@ -40,7 +40,7 @@
       "dashLength": 10,
       "dashes": false,
       "datasource": null,
-      "fill": 5,
+      "fill": 2,
       "gridPos": {
         "h": 7,
         "w": 24,
@@ -68,7 +68,7 @@
       "renderer": "flot",
       "seriesOverrides": [],
       "spaceLength": 10,
-      "stack": true,
+      "stack": false,
       "steppedLine": false,
       "targets": [
         {
@@ -126,7 +126,7 @@
       "dashLength": 10,
       "dashes": false,
       "datasource": null,
-      "fill": 5,
+      "fill": 2,
       "gridPos": {
         "h": 6,
         "w": 24,
@@ -154,7 +154,7 @@
       "renderer": "flot",
       "seriesOverrides": [],
       "spaceLength": 10,
-      "stack": true,
+      "stack": false,
       "steppedLine": false,
       "targets": [
         {