Update Stacklight models

Change-Id: Ia28bda9b1f75dba8320a052917426929fa867209
diff --git a/classes/cluster/sl_os_contrail/stacklight/server.yml b/classes/cluster/sl_os_contrail/stacklight/server.yml
index 8697478..f5462ae 100755
--- a/classes/cluster/sl_os_contrail/stacklight/server.yml
+++ b/classes/cluster/sl_os_contrail/stacklight/server.yml
@@ -71,4 +71,13 @@
           type: eth
           proto: static
           address: ${_param:single_address}
-          netmask: 255.255.255.0
\ No newline at end of file
+          netmask: 255.255.255.0
+  elasticsearch:
+    server:
+      heap:
+        size: 1
+  keepalived:
+    cluster:
+      instance:
+        VIP:
+          enabled: false
\ No newline at end of file