for an account csv sis import, the file must include the
parent_account_id column even if all the values in it are blank, so that
we can differentiate the file from a group import.
fixes CNVS-16875
test plan:
- check sis csv docs
Change-Id: I5c897a249886e8234a530ce9ea8e3b3dec88c093
Reviewed-on: https://gerrit.instructure.com/73205
Tested-by: Jenkins
Reviewed-by: Cody Cutrer <cody@instructure.com>
QA-Review: Jeremy Putnam <jeremyp@instructure.com>
Product-Review: Simon Williams <simon@instructure.com>