Update kitchen image version, change linux locales for tests

Change-Id: I5b146c466d9ee4110fd54e0421e944524641e9f6
diff --git a/.kitchen.yml b/.kitchen.yml
index e708ea2..a998cfd 100644
--- a/.kitchen.yml
+++ b/.kitchen.yml
@@ -29,9 +29,9 @@
   sudo: true
 
 platforms:
-  - name: <%=ENV['PLATFORM'] || 'ubuntu-xenial-2017.7'%>
+  - name: <%=ENV['PLATFORM'] ||  'saltstack-ubuntu-xenial-salt-stable' %>
     driver_config:
-      image: <%=ENV['PLATFORM'] || 'trevorj/salty-whales:xenial-2017.7'%>
+      image: <%=ENV['PLATFORM'] || 'epcim/salt-formulas:saltstack-ubuntu-xenial-salt-stable'%>
       platform: ubuntu
 
 
diff --git a/.travis.yml b/.travis.yml
index 0b24242..4ba771d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -22,19 +22,14 @@
   - bundle install
 
 env:
-  - PLATFORM=trevorj/salty-whales:trusty-2017.7 SUITE=network
-  - PLATFORM=trevorj/salty-whales:xenial-2017.7 SUITE=network
-  # - PLATFORM=trevorj/salty-whales:trusty-2017.7 SUITE=storage
-  # - PLATFORM=trevorj/salty-whales:xenial-2017.7 SUITE=storage
-  - PLATFORM=trevorj/salty-whales:trusty-2017.7 SUITE=system
-  - PLATFORM=trevorj/salty-whales:xenial-2017.7 SUITE=system
-  - PLATFORM=trevorj/salty-whales:trusty SUITE=network
-  - PLATFORM=trevorj/salty-whales:xenial SUITE=network
-  # - PLATFORM=trevorj/salty-whales:trusty SUITE=storage
-  # - PLATFORM=trevorj/salty-whales:xenial SUITE=storage
-  - PLATFORM=trevorj/salty-whales:trusty SUITE=system
-  - PLATFORM=trevorj/salty-whales:xenial SUITE=system
-## Test on both Salt version until there is new test policy accepted
+  - PLATFORM=epcim/salt-formulas:saltstack-ubuntu-xenial-salt-2016.3 SUITE=network
+  - PLATFORM=epcim/salt-formulas:saltstack-ubuntu-xenial-salt-2017.7 SUITE=network
+  # - PLATFORM=epcim/salt-formulas:saltstack-ubuntu-xenial-salt-2016.3 SUITE=storage
+  # - PLATFORM=epcim/salt-formulas:saltstack-ubuntu-xenial-salt-2017.7 SUITE=storage
+  - PLATFORM=epcim/salt-formulas:saltstack-ubuntu-xenial-salt-2016.3 SUITE=system
+  - PLATFORM=epcim/salt-formulas:saltstack-ubuntu-xenial-salt-2017.7 SUITE=system
+  # - PLATFORM=epcim/salt-formulas:saltstack-ubuntu-bionic-salt-2017.7 SUITE=network
+  # - PLATFORM=epcim/salt-formulas:saltstack-ubuntu-bionic-salt-2017.7 SUITE=system
 
 before_script:
   - set -o pipefail
diff --git a/tests/pillar/system.sls b/tests/pillar/system.sls
index bcbfa08..eb6201e 100644
--- a/tests/pillar/system.sls
+++ b/tests/pillar/system.sls
@@ -204,10 +204,10 @@
         key_url: http://apt-mk.mirantis.com/public.gpg
         architectures: amd64
     locale:
-      en_US.UTF-8:
+      en_US:
         enabled: true
         default: true
-      "cs_CZ.UTF-8 UTF-8":
+      cs_CZ:
         enabled: true
     autoupdates:
       enabled: true