Add back the vagrant plugins array, but leave it empty

Author: david-vo

attributes/vagrant.rb

@@ -19,3 +19,4 @@
 
 default['rs-cookbooks_ci']['vagrant']['url'] = 'https://dl.bintray.com/mitchellh/vagrant/vagrant_1.4.3_x86_64.deb'
 default['rs-cookbooks_ci']['vagrant']['checksum'] = 'dbd06de0f3560e2d046448d627bca0cbb0ee34b036ef605aa87ed20e6ad2684b'
+default['rs-cookbooks_ci']['vagrant']['plugins'] = []

recipes/vagrant.rb

@@ -34,3 +34,9 @@
   )
   not_if 'GEM_PATH=/var/lib/jenkins/.vagrant.d/gems gem list | grep nokogiri'
 end
+
+node['rs-cookbooks_ci']['vagrant']['plugins'].each do |plug_name|
+  vagrant_plugin plug_name do
+    user 'jenkins'
+  end
+end