fixes CNVS-35623
test plan:
* disable redis
* configure MFA; do not remember this computer
* on your profile, there should be a link to MFA backup codes
* follow it; it should show 10 codes
* log out and log back in, using one of those codes
* go back to your backup code list; the one you used should be
crossed out
* log out and log back in, attempting to use the same code;
it should not allow you to
* log in with another code
* make note of one of the unused backup codes
* regenerate your backup codes; it should give you 10 new codes,
all unused
* log out, and attempt to log in with one of the old unused codes;
it should not allow you to
* log in with one of the new backup codes; it should work
* make note of backup codes
* reconfigure MFA
* look at your backup codes again; they should be different
* make note of them again
* disable MFA, and then configure it again
* your backup codes should be different again
Change-Id: I20b1da102ef4cb757c80e1f46e276f88fdfb21b4
Reviewed-on: https://gerrit.instructure.com/21614
QA-Review: Tucker McKnight <tmcknight@instructure.com>
Tested-by: Jenkins
Reviewed-by: Simon Williams <simon@instructure.com>
Product-Review: McCall Smith <mcsmith@instructure.com>
0571277626
