Use new image for kitchen tests

Change-Id: I34565cd9e7f89324a0e9b708148ecfa480918591
diff --git a/.kitchen.yml b/.kitchen.yml
index 091dfb6..68166d1 100644
--- a/.kitchen.yml
+++ b/.kitchen.yml
@@ -29,9 +29,9 @@
   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: