change the way the password reset unit test is done to avoid issues with the way mysql handles datetimes.

add in a small delay on view_log entries to account for the fact that MySQL datetimes don't include milliseconds.

make it possible to complete the initialization process from outside the metabase.core namespace and trigger it in our test setup process so that logins work for unit tests again.

(= filtering against relative dates is WIP)

fix issue where unit test causes setup-token to be recreated on namespace reload, which is annoying in dev.

streamline public settings availability and syncing.  this is driven mostly by the need to have an `:email_configured` property that we can use on the frontend to dictate some of our UI.

add dynamic password complexity checking to the UserStep.  this is done by adding an /api/util/password_check endpoint that we can use to test passwords against as the user puts them in.