core: output the version that is added with BoxAdd

lib/vagrant/action/builtin/box_add.rb

@@ -332,7 +332,9 @@ module Vagrant
 
           env[:ui].success(I18n.t(
             "vagrant.box_added",
-            name: box.name, provider: box.provider))
+            name: box.name,
+            version: box.version,
+            provider: box.provider))
 
           # Store the added box in the env for future middleware
           env[:box_added] = box

templates/locales/en.yml

@@ -19,7 +19,7 @@ en:
     box_add_with_version: |-
       Adding box '%{name}' (v%{version}) for provider: %{providers}
     box_added: |-
-      Successfully added box '%{name}' for '%{provider}'!
+      Successfully added box '%{name}' (v%{version}) for '%{provider}'!
     box_downloading: |-
       Downloading: %{url}
     box_download_error: |-