feat(settings): enforce upcoming security setting default changes

Django 3.0 introduces some changes of security settings.
3 jobs for ci-tests in 3 minutes and 21 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
passed #5851
make_deb_package

00:02:08

 
  Test
passed #5853
deb_package_test

00:01:12

failed #5852
make_test

00:02:03

 
Name Stage Failure
failed
make_test Test

----------------------------------------------------------------------
Ran 27 tests in 2.124s

FAILED (errors=17)
Destroying test database for alias 'default'...
make: *** [build/makefilet/include/python.mk:82: test-python] Error 1
Cleaning up file based variables
ERROR: Job failed: exit code 1