python3Packages.django-tasks: disable failing test

Changed files
+2
pkgs
development
python-modules
django-tasks
+2
pkgs/development/python-modules/django-tasks/default.nix
···
"test_dry_run"
# AssertionError: '' != 'Deleted 1 task result(s)'
"test_prunes_tasks"
+
# AssertionError: 'Run maximum tasks (2)' not found in ''
+
"test_max_tasks"
];
preCheck = ''