manage.py test fails if sites app not installed
|Reported by:||Waldemar Kornewald||Owned by:||nobody|
|Cc:||Triage Stage:||Ready for checkin|
|Has patch:||yes||Needs documentation:||no|
|Needs tests:||no||Patch needs improvement:||no|
The unit tests of several contrib apps depend on the sites app even though the respective contrib app already falls back to RequestSite. The attached patch fixes the failing tests (at least the ones I've stumbled upon). Not sure how this patch relates to the proposed changes in #15089, though.