Put Grafana dashboards into their own directory

Change-Id: I98e26083eed316406aabbb5835a6f6a1893a6ac9
diff --git a/neutron/files/grafana_influxdb.json b/neutron/files/grafana_dashboards/neutron_influxdb.json
similarity index 100%
rename from neutron/files/grafana_influxdb.json
rename to neutron/files/grafana_dashboards/neutron_influxdb.json
diff --git a/neutron/meta/grafana.yml b/neutron/meta/grafana.yml
index ea32f2e..358949f 100644
--- a/neutron/meta/grafana.yml
+++ b/neutron/meta/grafana.yml
@@ -1,4 +1,4 @@
 dashboard:
   neutron:
     format: json
-    template: neutron/files/grafana_influxdb.json
+    template: neutron/files/grafana_dashboards/neutron_influxdb.json