fix module progression migrations

test plan:
 - migrations should run successfully, specifically
   - 20140418210000
   - 20140418211204
 - migrations should run predeploy

Change-Id: I764f996be7d7da350a3e88e702d1578979d7523d
Reviewed-on: https://gerrit.instructure.com/35245
Reviewed-by: Cody Cutrer <cody@instructure.com>
Tested-by: Jenkins <jenkins@instructure.com>
Product-Review: Cody Cutrer <cody@instructure.com>
QA-Review: Cody Cutrer <cody@instructure.com>