core: fix interpolation error on v1=>v2 upgrade warinings [GH-2142]

CHANGELOG.md

@@ -10,6 +10,7 @@ BUG FIXES:
     quickly in a multi-VM environment.
   - core: Handle the case where we get an EACCES cleaning up the .vagrant
     directory.
+  - core: Fix exception on upgrade warnings from V1 to V2. [GH-2142]
   - provisioners/chef: Work even with restrictive umask on user. [GH-2121]
   - provisioners/chef: Fix environment validation to be less restrictive.
   - provisioners/puppet: No more "shared folders cannot be found" error.

lib/vagrant/environment.rb

@@ -419,11 +419,11 @@ module Vagrant
         level  = config_errors.empty? ? :warn : :error
         output = Util::TemplateRenderer.render(
           "config/messages",
-          :name => name,
           :warnings => config_warnings,
           :errors => config_errors).chomp
-          @ui.send(level, I18n.t("vagrant.general.config_upgrade_messages",
-                                 :output => output))
+        @ui.send(level, I18n.t("vagrant.general.config_upgrade_messages",
+                               name: name,
+                               :output => output))
 
           # If we had errors, then we bail
           raise Errors::ConfigUpgradeErrors if !config_errors.empty?