Use 'openstack' in Grafana dashboard tags

Change-Id: I9548e7d11876d7c4d1d402b306f86ded0656ed50
Related-Bug: PROD-17781
diff --git a/neutron/files/grafana_dashboards/neutron_openvswitch_prometheus.json b/neutron/files/grafana_dashboards/neutron_openvswitch_prometheus.json
index 3cc03b4..9c4c498 100755
--- a/neutron/files/grafana_dashboards/neutron_openvswitch_prometheus.json
+++ b/neutron/files/grafana_dashboards/neutron_openvswitch_prometheus.json
@@ -1814,7 +1814,9 @@
   "schemaVersion": 14,
   "sharedCrosshair": true,
   "style": "dark",
-  "tags": [],
+  "tags": [
+    "openstack"
+  ],
   "templating": {
     "list": [
       {
diff --git a/neutron/files/grafana_dashboards/neutron_openvswitch_prometheus_fluentd.json b/neutron/files/grafana_dashboards/neutron_openvswitch_prometheus_fluentd.json
index b6c36f6..1a40767 100755
--- a/neutron/files/grafana_dashboards/neutron_openvswitch_prometheus_fluentd.json
+++ b/neutron/files/grafana_dashboards/neutron_openvswitch_prometheus_fluentd.json
@@ -1814,7 +1814,9 @@
   "schemaVersion": 14,
   "sharedCrosshair": true,
   "style": "dark",
-  "tags": [],
+  "tags": [
+    "openstack"
+  ],
   "templating": {
     "list": [
       {
diff --git a/neutron/files/grafana_dashboards/neutron_prometheus.json b/neutron/files/grafana_dashboards/neutron_prometheus.json
index 2285ede..ec93342 100755
--- a/neutron/files/grafana_dashboards/neutron_prometheus.json
+++ b/neutron/files/grafana_dashboards/neutron_prometheus.json
@@ -830,7 +830,9 @@
   "schemaVersion": 14,
   "sharedCrosshair": true,
   "style": "dark",
-  "tags": [],
+  "tags": [
+    "openstack"
+  ],
   "templating": {
     "list": [
       {
diff --git a/neutron/files/grafana_dashboards/neutron_prometheus_fluentd.json b/neutron/files/grafana_dashboards/neutron_prometheus_fluentd.json
index eaa51f4..24da598 100755
--- a/neutron/files/grafana_dashboards/neutron_prometheus_fluentd.json
+++ b/neutron/files/grafana_dashboards/neutron_prometheus_fluentd.json
@@ -830,7 +830,9 @@
   "schemaVersion": 14,
   "sharedCrosshair": true,
   "style": "dark",
-  "tags": [],
+  "tags": [
+    "openstack"
+  ],
   "templating": {
     "list": [
       {