Use new image for kitchen tests

Change-Id: I8b71c27c23a00c4d08bf5b6a79bf878ef100bc6a
diff --git a/.kitchen.yml b/.kitchen.yml
index ebc69d5..c8f40b8 100644
--- a/.kitchen.yml
+++ b/.kitchen.yml
@@ -41,9 +41,9 @@
   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: