Use new image for kitchen tests

Change-Id: I828c39d9439971f0ad9ecc582e5b12c43836dcc9
diff --git a/.kitchen.yml b/.kitchen.yml
index d8e1607..04f0f70 100644
--- a/.kitchen.yml
+++ b/.kitchen.yml
@@ -28,9 +28,9 @@
     noservices: 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
 
 verifier: