Feature/pt 107 disable quiz comments for orga

Closes #107 (closed)

What does this MR do?

moves the comments from orga to the BOTs of the quiz team.

How confident are you it won't break things if deployed?

Quite. Should do no harm at least.

Checklist

• added a test, or explain why one is not needed/possible... (it removes a feature so I cannot test. CI passes)
• no unrelated changes
• asked someone for a code review
• joined #foodsharing-beta channel at https://slackin.yunity.org
• added an entry to CHANGELOG.md (description, merge request link, username(s))