Load locale file only once

lib/vagrant-lxc/plugin.rb

@@ -8,12 +8,16 @@ module Vagrant
       The LXC provider allows Vagrant to manage and control
       LXC-based virtual machines.
       EOF
+      locale_loaded = false
 
       provider(:lxc, parallel: true, priority: 7) do
         require File.expand_path("../provider", __FILE__)
 
+        if not locale_loaded
             I18n.load_path << File.expand_path(File.dirname(__FILE__) + '/../../locales/en.yml')
             I18n.reload!
+            locale_loaded = true
+        end
 
         Provider
       end