Add builtin disk action

lib/vagrant/action/builtin/disk.rb

@@ -0,0 +1,19 @@
+module Vagrant
+  module Action
+    module Builtin
+      class Disk
+        def initialize(app, env)
+          @app    = app
+          @logger = Log4r::Logger.new("vagrant::action::builtin::disk")
+        end
+
+        def call(env)
+          machine = env[:machine]
+
+          # Continue On
+          @app.call(env)
+        end
+      end
+    end
+  end
+end