Automatically give penalty when payment is overdue

[itsisak]

Currently this checks every day at 2100 if there is any events with overdue payments. If so it gives penalty to the users who have not paid, unregisters them from the event and sends notification.

This is a first draft of the consept. Future improvements should be to check if they paid after the set deadline, not just at 2100. Also the notification to the event creator could be removed if this is solution is satisfactory.

Also im not married to the names like event_payment_overdue_penalty i will try to think of some better, but it is conflicting with the currently existing payment_overdue functionalities (which is more like payment_due)

Resolves ABA-30

[codecov]

Codecov Report

Attention: Patch coverage is 95.71429% with 3 lines in your changes missing coverage. Please review.

Project coverage is 89.13%. Comparing base (d49dca9) to head (192746f).
Report is 29 commits behind head on master.

Files with missing lines	Patch %	Lines
lego/apps/events/notifications.py	62.50%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3646      +/-   ##
==========================================
+ Coverage   89.11%   89.13%   +0.02%     
==========================================
  Files         682      683       +1     
  Lines       21464    21533      +69     
==========================================
+ Hits        19128    19194      +66     
- Misses       2336     2339       +3     

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[linear]

ABA-30 Automatically give a prikk to everyone who has not payed for an event after the payment deadline has passed

[jonasdeluna]

Nice!