[1.4.X] Fixed #19506 - Remove 'mysite' prefix in model example.
[1.4.X] Fixed #19506 - Remove 'mysite' prefix in model example.

Thanks Mike O'Connor for the report.

Backport of 52a2588df6 from master

riklaunim/django-custom-multisite,riklaunim/django-custom-multisite,riklaunim/django-custom-multisite