rails 6: instsfs e2e spec fixes
rails 6: instsfs e2e spec fixes

Change-Id: I612a02be7cfde569c1b02d45727b61293aefc25f
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/250753
Reviewed-by: Michael Ziwisky <ef1d6a5d3a192ea9486f58aa31b1688dee7f9f81@instructure.com>
Tested-by: Cody Cutrer <c4fe2b1d90ef8f2548c8aeabfa633434316f0305@instructure.com>
QA-Review: Cody Cutrer <c4fe2b1d90ef8f2548c8aeabfa633434316f0305@instructure.com>
Product-Review: Cody Cutrer <c4fe2b1d90ef8f2548c8aeabfa633434316f0305@instructure.com>

sfu/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,instructure/canvas-lms