Rails3: scm: cvs: fix error of test_fetch_changesets_incremental at unit model test
On Rails 3.1, ActiveRecord::HasManyThroughCantAssociateThroughHasOneOrManyReflection error raises. For more details, see r7062.
Authored by: tmaruyama 2012-02-26
Parent: [r9015]
Child: [r9017]
