FIx vagrant package --base to work again, wrong Machine args [GH-1410]

plugins/commands/package/command.rb

@@ -52,7 +52,12 @@ module VagrantPlugins
         # better in the future. We just hardcode this to keep VirtualBox working
         # for now.
         provider = Vagrant.plugin("2").manager.providers[:virtualbox]
-        vm = Vagrant::Machine.new(options[:base], provider, @env.config.global, nil, @env, true)
+        vm = Vagrant::Machine.new(
+          options[:base],
+          :virtualbox, provider,
+          nil, @env.config_global,
+          nil, nil,
+          @env, true)
         @logger.debug("Packaging base VM: #{vm.name}")
         package_vm(vm, options)
       end