fixes application controller tests by defining available_languages

test/functional/application_controller_test.rb

@@ -29,6 +29,7 @@ class ApplicationControllerTest < ActionController::TestCase
   # check that all language files are valid
   def test_localization
     lang_files_count = Dir["#{RAILS_ROOT}/config/locales/*.yml"].size
+    Setting.available_languages = Setting.all_languages
     assert_equal lang_files_count, valid_languages.size
     valid_languages.each do |lang|
       assert set_language_if_valid(lang)