[Tech] write chrome headless logs to files during feature specs
Created by: adipasquale
linked to https://trello.com/c/yibIcLXq/601-fix-randomly-failing-feature-specs
logs are written to tmp/capybara/chrome.spec_full_description.browser/driver.log
and on CircleCI they are uploaded as artifacts so you can see them after the tests have run.
note: they may still be duplicated across different specs, I'm not sure if the logs are cleared between tests