backout r11865 test/object_helpers.rb changes

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11867 e93f8b46-1217-0410-a6f0-8f06a7374b81
fix unit VersionTest failure

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11868 e93f8b46-1217-0410-a6f0-8f06a7374b81