Change disk size for stacklight nodes

Change-Id: I673afcfe7b94bf226d988104b6a821df1b2e5137
diff --git a/salt/control/cluster/stacklight_log_cluster.yml b/salt/control/cluster/stacklight_log_cluster.yml
index 330e301..e4c08b6 100644
--- a/salt/control/cluster/stacklight_log_cluster.yml
+++ b/salt/control/cluster/stacklight_log_cluster.yml
@@ -5,7 +5,7 @@
         stacklight.log:
           cpu: 32
           ram: 65536
-          disk_profile: small
+          disk_profile: xxxxlarge
           net_profile: default
       cluster:
         internal: