`vagrant box` uses new Environment

lib/vagrant/commands.rb

@@ -169,7 +169,7 @@ msg
       # which action to take and calls the respective action method
       # (see {box_add} and {box_remove})
       def box(argv)
-        Env.load!
+        Environment.load!
 
         sub_commands = ["list", "add", "remove"]
 

test/vagrant/commands_test.rb

@@ -255,7 +255,7 @@ class CommandsTest < Test::Unit::TestCase
     end
 
     should "load the environment" do
-      Vagrant::Env.expects(:load!).once
+      Vagrant::Environment.expects(:load!).once
       Vagrant::Commands.box(["add"])
     end