Behat: Using email in tests

[Rebecca Blundell]

We don't use email in behat, but apparently we could. Here are some links to the documentation:

https://docs.behat.org/en/v2.5/cookbook/intercepting_the_redirections.html#implementing-interception-steps-logic
https://docs.behat.org/en/v2.5/cookbook/using_the_profiler_with_minkbundle.html

We could investigate whether its possible to implement the system they suggest in Mahara's behat. It would mean that we could automate more of the test suite.