Use new image for kitchen tests

Change-Id: I9104a3d6dac0351cbdba3cd63192a1443cdf099d
diff --git a/.kitchen.yml b/.kitchen.yml
index 730b126..1eb01ce 100644
--- a/.kitchen.yml
+++ b/.kitchen.yml
@@ -55,9 +55,9 @@
   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
     provisioner:
       pillars: