Use new image for kitchen tests

Change-Id: I9a4f96a7739bc5c04c176fb473325a97454d2ff0
diff --git a/.kitchen.yml b/.kitchen.yml
index 8a6a314..9c76e39 100644
--- a/.kitchen.yml
+++ b/.kitchen.yml
@@ -33,9 +33,9 @@
   sudo: true
 
 platforms:
-  - name: <%=ENV['PLATFORM'] || 'ubuntu-xenial'%>
+  - name: <%=ENV['PLATFORM'] ||  'saltstack-ubuntu-xenial-salt-stable' %>
     driver_config:
-      image: <%=ENV['PLATFORM'] || 'trevorj/salty-whales:xenial'%>
+      image: <%=ENV['PLATFORM'] || 'epcim/salt-formulas:saltstack-ubuntu-xenial-salt-stable'%>
       platform: ubuntu
 
 suites: