This change adds a fail-fast mechanism to our E2E tests based on
the browser console. This will fail super hard if an unhandled exception
is thrown.
I think it would be interesting to also see if we could do the same
thing for 404s.
The goal of this change is to make it so that the E2E tests can fail
faster (3-4s) than the 30s timeout in the case that something
catastrophic happens. As a nice side benefit you get to see the
exception message.
3cc6e8373b