[#52473607] fix timing for inactivity_logout_spec flickering_test
[completes #52473607] fixes password generation for users created from openID
Adds support for deprecated omniauth-mygov gem.
[completes #57575618] use HTTP status code 404 on custom 404 page
Fixed already_confirmed language typo.
[completes #57679584] - Prepare for government shutdown