some missed rspec 3-ify

refs CNVS-16239

Change-Id: I387cb3751634061901672cf4a0c22bcf5174b71e
Reviewed-on: https://gerrit.instructure.com/42884
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Braden Anderson <braden@instructure.com>
Product-Review: Braden Anderson <braden@instructure.com>
QA-Review: Braden Anderson <braden@instructure.com>