no more dynamic finders (models)

refs CNVS-15126

Change-Id: I2996e0e262c41274c34d0ea3bfde757074416b8c
Reviewed-on: https://gerrit.instructure.com/40973
Reviewed-by: Jacob Fugal <jacob@instructure.com>
Tested-by: Jenkins <jenkins@instructure.com>
Product-Review: Cody Cutrer <cody@instructure.com>
QA-Review: Cody Cutrer <cody@instructure.com>