Rails3: replace "all" fixtures at test/unit/mailer_test.rb

Following error raises.
Fixture::FormatError: Bad data for Configuration::Empty fixture named default (nil)

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@7497 e93f8b46-1217-0410-a6f0-8f06a7374b81

test/unit/mailer_test.rb

@@ -20,7 +20,13 @@ require File.expand_path('../../test_helper', __FILE__)
 class MailerTest < ActiveSupport::TestCase
   include Redmine::I18n
   include ActionController::Assertions::SelectorAssertions
-  fixtures :all
+  fixtures :projects, :enabled_modules, :issues, :users, :members,
+           :member_roles, :roles, :documents, :attachments, :news,
+           :tokens, :journals, :journal_details, :changesets, :trackers,
+           :issue_statuses, :enumerations, :messages, :boards, :repositories,
+           :wikis, :wiki_pages, :wiki_contents, :wiki_content_versions,
+           :versions,
+           :comments
 
   def setup
     ActionMailer::Base.deliveries.clear