edx/edx-tim — pull request #160 by wedaly (2014-03-18 13:16:16+00:00)
Title: Unlink assessment models from submission models

[TIM-275](https://edx-wiki.atlassian.net/browse/TIM-275)

In the migration, I set default values for `Assessment.submission` (the old field) and `Assessment.submission_uuid` (the new field) both to 0.

@ormsbee