Rename prometheus glusterfs volume

Change-Id: I9a2127c5344ed3b5d81767c899271d983888210f
diff --git a/glusterfs/server/volume/prometheus.yml b/glusterfs/server/volume/prometheus.yml
index 2c4ca31..144847a 100644
--- a/glusterfs/server/volume/prometheus.yml
+++ b/glusterfs/server/volume/prometheus.yml
@@ -2,13 +2,13 @@
   glusterfs:
     server:
       volumes:
-        prometheus-config:
-          storage: /srv/glusterfs/prometheus-config
+        prometheus:
+          storage: /srv/glusterfs/prometheus
           replica: 3
           bricks:
-            - ${_param:cluster_node01_address}:/srv/glusterfs/prometheus-config
-            - ${_param:cluster_node02_address}:/srv/glusterfs/prometheus-config
-            - ${_param:cluster_node03_address}:/srv/glusterfs/prometheus-config
+            - ${_param:cluster_node01_address}:/srv/glusterfs/prometheus
+            - ${_param:cluster_node02_address}:/srv/glusterfs/prometheus
+            - ${_param:cluster_node03_address}:/srv/glusterfs/prometheus
           options:
             cluster.readdir-optimize: On
             nfs.disable: On