Browserstack results and test name

[adgad]

Browserstack currently reports all the tests as green, we should update the status to reflect the actual status.

See https://www.browserstack.com/automate/rest-api "Mark tests as pass or fail"

See https://github.com/itszero/wdio-browserstack-service/blob/master/lib/browserstack-service.js as a kind of example, or https://github.com/Financial-Times/next-corp-signup/blob/master/test/browser/config/commands/endAndReportStatusToSauce.js#L33

It would also be nice if the tests had the name of the app running them - not quite sure how to do that but it's probably in the browserstack documentation somewhere!