Use new image for kitchen tests

Change-Id: I84a3bab57955fbfd794f9aa123d3fcbf44581905
diff --git a/.kitchen.yml b/.kitchen.yml
index ff1894d..f69baf6 100644
--- a/.kitchen.yml
+++ b/.kitchen.yml
@@ -37,9 +37,9 @@
   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: