Use new image for kitchen tests

Change-Id: I88c948db1c817c1d06d41b544a55676871d9bd9b
diff --git a/.travis.yml b/.travis.yml
index 16cd706..d46823c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -17,8 +17,9 @@
   - bundle install
 
 env:
-    - PLATFORM=trevorj/salty-whales:trusty SUITE=config
-    - PLATFORM=trevorj/salty-whales:xenial SUITE=config
+    - PLATFORM=epcim/salt-formulas:saltstack-ubuntu-xenial-salt-2016.3 SUITE=config
+    - PLATFORM=epcim/salt-formulas:saltstack-ubuntu-xenial-salt-2017.7 SUITE=config
+#    - PLATFORM=epcim/salt-formulas:saltstack-ubuntu-bionic-salt-2017.7 SUITE=config
 
 before_script:
   - set -o pipefail