Update travis yml, default tested platforms
diff --git "a/\173\173cookiecutter.service_name\175\175/.travis.yml" "b/\173\173cookiecutter.service_name\175\175/.travis.yml"
index abc6b38..a01ab1a 100644
--- "a/\173\173cookiecutter.service_name\175\175/.travis.yml"
+++ "b/\173\173cookiecutter.service_name\175\175/.travis.yml"
@@ -22,9 +22,13 @@
   - bundle install
 
 env:
-    - PLATFORM=epcim/salt-formulas:saltstack-ubuntu-xenial-salt-2017.7
-    - PLATFORM=epcim/salt-formulas:saltstack-ubuntu-xenial-salt-2016.3
-#    - PLATFORM=epcim/salt-formulas:saltstack-ubuntu-bionic-salt-2017.7
+    - PLATFORM=epcim/salt:saltstack-ubuntu-xenial-salt-2016.3
+    - PLATFORM=epcim/salt:saltstack-ubuntu-xenial-salt-2017.7
+    - PLATFORM=epcim/salt:saltstack-ubuntu-xenial-salt-stable
+    - PLATFORM=epcim/salt:saltstack-ubuntu-bionic-salt-2017.7
+    - PLATFORM=epcim/salt:saltstack-ubuntu-bionic-salt-stable
+    - PLATFORM=epcim/salt:saltstack-centos-7-salt-2017.7
+    - PLATFORM=epcim/salt:saltstack-centos-7-salt-stable
 
 before_script:
   - set -o pipefail