Use new image for kitchen tests

Change-Id: I02c6a71ee05d4b1a8d88be55d03061464d0135fd
diff --git a/.kitchen.yml b/.kitchen.yml
index dcd688c..12347a1 100644
--- a/.kitchen.yml
+++ b/.kitchen.yml
@@ -35,9 +35,9 @@
   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: