Set proper default language.

git-svn-id: http://svn.redmine.org/redmine/trunk@13914 e93f8b46-1217-0410-a6f0-8f06a7374b81

test/unit/wiki_content_test.rb

@@ -95,7 +95,7 @@ class WikiContentTest < ActiveSupport::TestCase
     content = @page.content
     content.text = "My new content"
 
-    with_settings :notified_events => %w(wiki_content_updated) do
+    with_settings :notified_events => %w(wiki_content_updated), :default_language => 'en' do
       assert content.save
     end