Add kitchen-dokken support to .travis.yml and Gemfile

.travis.yml

@@ -1,11 +1,42 @@
-# Use Travis's cointainer based infrastructure
-sudo: false
-
-language: ruby
-# Travis: Bundler that comes with Ruby 2.1.0 is too old (1.6.9)
-before_install: gem update bundler
-bundler_args: --without kitchen_vagrant
-rvm:
-- 2.1.0
-script:
-- bundle exec rake travis
+sudo: required
+dist: trusty
+
+# install the pre-release chef-dk.  Use chef-stable-trusty to install the stable release
+addons:
+  apt:
+    sources:
+      - chef-current-trusty
+    packages:
+      - chefdk
+
+# Don't `bundle install` which takes about 1.5 mins
+install: echo "skip bundle install"
+
+branches:
+  only:
+    - master
+
+services: docker
+
+env:
+  matrix:
+  - INSTANCE=centos-7
+  - INSTANCE=ubuntu-1404
+  - INSTANCE=ubuntu-1604
+
+before_script:
+  - sudo iptables -L DOCKER || ( echo "DOCKER iptables chain missing" ; sudo iptables -N DOCKER )
+  - eval "$(/opt/chefdk/bin/chef shell-init bash)"
+
+script: KITCHEN_LOCAL_YAML=.kitchen.dokken.yml /opt/chefdk/embedded/bin/kitchen verify ${INSTANCE}
+
+matrix:
+  include:
+    - before_script:
+      - eval "$(/opt/chefdk/bin/chef shell-init bash)"
+      - /opt/chefdk/embedded/bin/chef --version
+      - /opt/chefdk/embedded/bin/cookstyle --version
+      - /opt/chefdk/embedded/bin/foodcritic --version
+    - script:
+      - /opt/chefdk/bin/chef exec rake
+      env: UNIT_AND_LINT=1

Gemfile

@@ -5,6 +5,7 @@ gem 'chefspec'
 gem 'github_changelog_generator'
 gem 'kitchen-digitalocean'
 gem 'stove'
+gem 'kitchen-dokken'
 
 group :lint do
   gem 'foodcritic'