Run travis tests using Chef-DK installation

.travis.yml

@@ -1,12 +1,28 @@
+# Use Travis's cointainer based infrastructure
 sudo: false
-cache: bundler
-language: ruby
-bundler_args: --without kitchen_common kitchen_vagrant kitchen_cloud
-rvm:
-  - 2.0
-  - 2.1
-  - 2.2
+addons:
+  apt:
+    sources:
+      - chef-stable-precise
+    packages:
+      - chefdk
+
+# Don't `bundle install`
+install: echo "skip bundle install"
+
+branches:
+  only:
+    - master
+
+# Ensure we make ChefDK's Ruby the default
+before_script:
+  - eval "$(/opt/chefdk/bin/chef shell-init bash)"
+  # We have to install chef-sugar for ChefSpec
+  - /opt/chefdk/embedded/bin/chef gem install chef-sugar
 script:
-  - bundle exec foodcritic -f any .
-  - bundle exec rubocop
-  - bundle exec rspec --color --format progress
+  - /opt/chefdk/embedded/bin/chef --version
+  - /opt/chefdk/embedded/bin/rubocop --version
+  - /opt/chefdk/embedded/bin/rubocop
+  - /opt/chefdk/embedded/bin/foodcritic --version
+  - /opt/chefdk/embedded/bin/foodcritic . --exclude spec
+  - /opt/chefdk/embedded/bin/rspec spec