Rails3: scm: cvs: fix error of test_annotate at unit model test
On Rails 3.1, ActiveRecord::HasManyThroughCantAssociateThroughHasOneOrManyReflection error raises. For more details, see r7062.
Rails3: scm: cvs: fix error of test_cat at unit model test
Rails3: scm: cvs: fix error of test_entries_invalid_revision at unit model test
Rails3: scm: cvs: fix error of test_entries_invalid_path at unit model test
Rails3: scm: cvs: fix error of test_entries_rev3 at unit model test
Rails3: scm: cvs: fix error of test_deleted_files_should_not_be_listed at unit model test
Rails3: scm: cvs: fix error of test_fetch_changesets_from_scratch at unit model test
Rails3: scm: git: fix error of test_browse_directory at functional test
Rails3: scm: mercurial: fix error of test_show_at_given_revision at functional test
Rails3: scm: mercurial: fix error of test_show_directory at functional test