fix add_role_id_columns for inactive roles

Change-Id: I19d60fee85e4cb4cd1bddf606adc53be1caa36eb
Reviewed-on: https://gerrit.instructure.com/44296
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Cody Cutrer <cody@instructure.com>
QA-Review: James Williams  <jamesw@instructure.com>
Product-Review: James Williams  <jamesw@instructure.com>