SetHostname middleware uses hostname

plugins/providers/virtualbox/action/host_name.rb

@@ -0,0 +1,21 @@
+module VagrantPlugins
+  module ProviderVirtualBox
+    module Action
+      class HostName
+        def initialize(app, env)
+          @app = app
+        end
+
+        def call(env)
+          @app.call(env)
+
+          host_name = env[:machine].config.vm.hostname
+          if !host_name.nil?
+            env[:ui].info I18n.t("vagrant.actions.vm.host_name.setting")
+            env[:machine].guest.change_host_name(host_name)
+          end
+        end
+      end
+    end
+  end
+end