Put Grafana dashboards into their own directory

Change-Id: I1182df1a9a288f6f02dace73544e3ae29b6e464f
diff --git a/keystone/files/grafana_influxdb.json b/keystone/files/grafana_dashboards/keystone_influxdb.json
similarity index 100%
rename from keystone/files/grafana_influxdb.json
rename to keystone/files/grafana_dashboards/keystone_influxdb.json
diff --git a/keystone/meta/grafana.yml b/keystone/meta/grafana.yml
index 81ca28b..c0bd17f 100644
--- a/keystone/meta/grafana.yml
+++ b/keystone/meta/grafana.yml
@@ -1,4 +1,4 @@
 dashboard:
   keystone:
     format: json
-    template: keystone/files/grafana_influxdb.json
+    template: keystone/files/grafana_dashboards/keystone_influxdb.json