Use new image for kitchen tests

Change-Id: I240905ec5e8a725dc5d16865f78bdbce414cfe46
diff --git a/.travis.yml b/.travis.yml
index f13f079..784cbc4 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -17,12 +17,15 @@
   - bundle install
 
 env:
-    - PLATFORM=trevorj/salty-whales:trusty-2017.7 SUITE=ssl
-    - PLATFORM=trevorj/salty-whales:xenial-2017.7 SUITE=ssl
-    - PLATFORM=trevorj/salty-whales:trusty-2017.7 SUITE=control-single
-    - PLATFORM=trevorj/salty-whales:xenial-2017.7 SUITE=control-single
-    - PLATFORM=trevorj/salty-whales:trusty-2017.7 SUITE=control-cluster
-    - PLATFORM=trevorj/salty-whales:xenial-2017.7 SUITE=control-cluster
+    - PLATFORM=epcim/salt-formulas:saltstack-ubuntu-xenial-salt-2016.3 SUITE=ssl
+    - PLATFORM=epcim/salt-formulas:saltstack-ubuntu-xenial-salt-2016.3 SUITE=control-single
+    - PLATFORM=epcim/salt-formulas:saltstack-ubuntu-xenial-salt-2016.3 SUITE=control-cluster
+    - PLATFORM=epcim/salt-formulas:saltstack-ubuntu-xenial-salt-2017.7 SUITE=ssl
+    - PLATFORM=epcim/salt-formulas:saltstack-ubuntu-xenial-salt-2017.7 SUITE=control-single
+    - PLATFORM=epcim/salt-formulas:saltstack-ubuntu-xenial-salt-2017.7 SUITE=control-cluster
+#    - PLATFORM=epcim/salt-formulas:saltstack-ubuntu-bionic-salt-2017.7 SUITE=ssl
+#    - PLATFORM=epcim/salt-formulas:saltstack-ubuntu-bionic-salt-2017.7 SUITE=control-single
+#    - PLATFORM=epcim/salt-formulas:saltstack-ubuntu-bionic-salt-2017.7 SUITE=control-cluster
 
 before_script:
   - set -o pipefail