edx/edx-platform — pull request #961 by VikParuchuri (2013-09-12 19:19:07+00:00)
Title: Fix problem with peer grading list not rendering, test

@brianhw @nedbat Please review. Fixes https://edx-wiki.atlassian.net/browse/OEE-139 . Basically, the way xmodules used modulestores was changed, and the affected code was buried in a broad exception block, so it never came up as an issue here. Fix that, and add in a test to prevent a future problem.