Require beaker-rspec >= 2.2

Gemfile

@@ -6,8 +6,7 @@ group :development, :test do
   gem 'rspec-puppet',           :require => false
   gem 'puppetlabs_spec_helper', :require => false
   gem 'simplecov',              :require => false
-  gem 'beaker',                 :require => false
-  gem 'beaker-rspec',           :require => false
+  gem 'beaker-rspec', '>= 2.2', :require => false
   gem 'puppet-lint',            :require => false
   gem 'serverspec',             :require => false
   gem 'pry',                    :require => false