recording

Ideally, this will get rid of some of our spurious test failures that occur from relying on httpbin.org and will make the test suite faster as we won't be going over the network, we'll just be using localhost (which is still slow but less slow than actually going over the network).

• Go to the admin interface
• Select some events
• Select Action → Start Task

Deactivating all selected events will cause Opencast to highlight at the selection blocks that some need to be checked.
If you deactivate the boxes one after another, this highlighting is inconstistent:

![start-task-selection](https://user-images.githubusercontent.com/1008395/95011535-ae28b680-0631-11eb-89ba-94a