Update testing deps / kitchen.yml format

Author: tas50

.kitchen.yml

@@ -1,5 +1,5 @@
----
-driver_plugin: vagrant
+driver:
+  name: vagrant
 
 driver_config:
   customize:

Gemfile

@@ -1,9 +1,31 @@
 source 'https://rubygems.org'
 
-gem 'kitchen-digitalocean', git: 'https://github.com/someara/kitchen-digitalocean', branch: 'someara'
-gem 'kitchen-ec2'
-gem 'kitchen-vagrant'
-gem 'kitchen-sync'
-gem 'berkshelf', '~> 4.0'
-gem 'chefspec', github: 'jkeiser/chefspec', branch: 'jk/chefspec-12.5'
-gem 'kitchen-inspec'
+group :rake do
+  gem 'rake'
+  gem 'tomlrb'
+end
+
+group :lint do
+  gem 'foodcritic', '~> 6.0'
+  gem 'rubocop', '~> 0.36'
+end
+
+group :unit do
+  gem 'berkshelf',  '~> 4.0'
+  gem 'chefspec',   '~> 4.5'
+end
+
+group :kitchen_common do
+  gem 'test-kitchen', '~> 1.5'
+  gem 'kitchen-sync'
+  gem 'kitchen-inspec'
+end
+
+group :kitchen_vagrant do
+  gem 'kitchen-vagrant', '~> 0.19'
+end
+
+group :kitchen_cloud do
+  gem 'kitchen-digitalocean', git: 'https://github.com/someara/kitchen-digitalocean', branch: 'someara'
+  gem 'kitchen-ec2'
+end