Put the Grafana dashboards into their own directory

Change-Id: Ia616602e62ec3994f32b30b065c16de4128f9577
diff --git a/glance/files/grafana_influxdb.json b/glance/files/grafana_dashboards/glance_influxdb.json
similarity index 100%
rename from glance/files/grafana_influxdb.json
rename to glance/files/grafana_dashboards/glance_influxdb.json
diff --git a/glance/meta/grafana.yml b/glance/meta/grafana.yml
index 7a0a735..a4aea19 100644
--- a/glance/meta/grafana.yml
+++ b/glance/meta/grafana.yml
@@ -1,4 +1,4 @@
 dashboard:
   glance:
     format: json
-    template: glance/files/grafana_influxdb.json
+    template: glance/files/grafana_dashboards/glance_influxdb.json