refs: https://github.com/TryGhost/DevOps/issues/78
Some tests needed to disconnect Stripe + reconnect, so the code had to be changed to match the new Stripe Connect method.
Some tests in publishing.spec have been modified to work out-of-order, which will enable us to use fullyParallel in future (a change which brings test runs down from 85~ seconds to 50~ seconds).
refs: https://github.com/TryGhost/DevOps/issues/78
Instead of running a single instance of Ghost, we now run an instance of Ghost for each test worker.
This has the unfortunate effect that a test failing will close and restart a new instance of Ghost, but in general will be multiple times faster than sequential execution of tests.
