edx/edx-ora2 — pull request #634 by symbolist (2014-11-18 12:38:06+00:00)
Title: Fix field AssessmentPart.criterion to point to Criterion table.

Migration 0020 incorrectly altered the field to point to the
CriterionOption table.

I have also changed the model serialisations in the earlier migrations so that they are consistent with the state of the database.

TNL-826