Fixed some more test/unit/*_test.rb breaking when run alone (#12285)

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@10786 e93f8b46-1217-0410-a6f0-8f06a7374b81

test/unit/lib/redmine/menu_manager/menu_helper_test.rb

@@ -21,7 +21,7 @@ class Redmine::MenuManager::MenuHelperTest < ActionView::TestCase
 
   include Redmine::MenuManager::MenuHelper
   include ERB::Util
-  fixtures :users, :members, :projects, :enabled_modules
+  fixtures :users, :members, :projects, :enabled_modules, :roles, :member_roles
 
   def setup
     setup_with_controller