use new docker images

Gemfile

@@ -2,19 +2,6 @@
 
 source 'https://rubygems.org'
 
-group :test do
-  gem 'rake'
-  gem 'foodcritic', '~> 4.0'
-  gem 'thor-foodcritic'
-  gem 'coveralls',  require: false
-end
-
-group :development do
-  gem 'guard'
-  gem 'guard-rspec'
-  gem 'guard-kitchen'
-end
-
 group :integration do
   gem 'test-kitchen', '~> 1.0'
   gem 'kitchen-ansible'
@@ -26,10 +13,6 @@ group :integration do
   gem 'kitchen-docker'
 end
 
-group :openstack do
-  gem 'kitchen-openstack'
-end
-
 group :tools do
   gem 'github_changelog_generator', '~> 1'
 end