fix bulk uploading to canvadocs

fixes CNVS-15424

test plan:
- specs should pass
- uploading a document that fails crocodoc should immediately upload to
  canvadocs, rather than waiting for the first view.

Change-Id: I12dd038e87c74ec040b5e4bae0d6d47d35854e55
Reviewed-on: https://gerrit.instructure.com/40910
Reviewed-by: Cody Cutrer <cody@instructure.com>
Tested-by: Jenkins <jenkins@instructure.com>
QA-Review: Anna Koalenz <akoalenz@instructure.com>
Product-Review: Simon Williams <simon@instructure.com>