scm: fix JRuby tests fail in unit changeset following test.
* test_invalid_utf8_sequences_in_paths_should_be_replaced
Following Subversion functional tests fail on Japanese Windows + JRuby 1.6.2 (ruby-1.8.7-p330).
* test_directory_diff
* test_revision_diff
git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/branches/1.2-stable@6453 e93f8b46-1217-0410-a6f0-8f06a7374b81