Automatically deactivate team if their absent count exceeds threshold

[htoo97]

Take a look at one of the files changed in Vicki's PR. When you append the annotator to the item.absent, it increases the count. At that point, check if that count exceeds the threshold and if it does, deactivate the team.

1. Threshold - we'll define this as an environment variable. Think it should just be adding a key to the env key in the app.json.

2. Deactivate the team - look at the POST route /admin/item in the admin controller