Different environments run on different hardware so response times vary
based on hardware. Instead of hardcoding the timeout for
`SystemHelpers#try_until_success` to 2 seconds, we change it such that
it follows `Capybara.default_wait_timeout` which we have configured to
be higher in environments which runs on lousier hardware.
This change should reduce the amount of flakiness we're seeing on CI
with tests that rely on `SystemHlpers#try_until_success`.
626eda4c91