Test using ChefDK not Gemfiles

These test deps were super out of date and they've probably been updated multiple times over the history of this cookbook. Constantly working out a compatible set of deps that works on every user's ruby release is a nightmare left up to Chef employees. Use DK as the set of test deps. It works on every platform and is updated.

Signed-off-by: Tim Smith <tsmith@chef.io>

.travis.yml

@@ -1,5 +1,27 @@
-language: ruby
-bundler_args: --without integration
-rvm:
-  - 2.3
-before_install: gem install bundler -v 1.10.6
+
+dist: trusty
+sudo: false
+addons:
+  apt:
+    sources:
+      - chef-current-trusty
+    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)"
+
+script:
+  - /opt/chefdk/embedded/bin/chef --version
+  - /opt/chefdk/embedded/bin/cookstyle --version
+  - /opt/chefdk/embedded/bin/foodcritic --version
+  - /opt/chefdk/bin/chef exec rake
+

Gemfile

@@ -1,27 +1,15 @@
-source "https://rubygems.org"
+# This gemfile provides additional gems for testing and releasing this cookbook
+# It is meant to be installed on top of ChefDK which provides the majority
+# of the necessary gems for testing this cookbook
+#
+# Run 'chef exec bundle install' to install these dependencies
 
-group :lint do
-  gem 'foodcritic', '~> 6.2'
-  gem 'rubocop', '~> 0.39.0'
-end
+source "https://rubygems.org"
 
 group :develop do
-  gem "chef", "~> 12.9"
-  gem "chefspec", "~> 6.0"
-  gem "stove", "~> 4.1"
-  gem "berkshelf", ">= 5.6.4", "< 6.0"
-  gem "rake"
+  gem "stove", "~> 5.0"
   gem "guard"
   gem "guard-foodcritic"
   gem "guard-rspec"
   gem "guard-rubocop"
 end
-
-group :integration do
-  gem "test-kitchen", "~> 1.8"
-  gem "kitchen-docker"
-  gem "kitchen-vagrant"
-  gem "winrm", "~> 2.0"
-  gem "winrm-fs"
-  gem "winrm-elevated"
-end