Default data loader raises an error when called from the rake task (#14607).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@12076 e93f8b46-1217-0410-a6f0-8f06a7374b81

lib/tasks/load_default_data.rake

@@ -2,6 +2,7 @@ desc 'Load Redmine default configuration data. Language is chosen interactively
 
 namespace :redmine do
   task :load_default_data => :environment do
+    require 'custom_field'
     include Redmine::I18n
     set_language_if_valid('en')