Replaces #active_children with nested scopes #descendants.active

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/branches/work@2152 e93f8b46-1217-0410-a6f0-8f06a7374b81

nested_projects/test/unit/project_test.rb

@@ -60,7 +60,7 @@ class ProjectTest < Test::Unit::TestCase
     assert !user.projects.include?(@ecookbook)
     # Subproject are also archived
     assert !@ecookbook.children.empty?
-    assert @ecookbook.active_children.empty?
+    assert @ecookbook.descendants.active.empty?
   end
   
   def test_unarchive