fix: Fixing test due to the change in django32.

Objects assigned to class attributes in TestCase.setUpTestData() are now isolated for each test method.

https://docs.djangoproject.com/en/3.2/releases/3.2/#tests

BOM-2866

lms/djangoapps/teams/tests/test_views.py

@@ -13,7 +13,7 @@ import ddt
 import pytz
 from dateutil import parser
 from django.conf import settings
-from django.contrib.auth.models import User
+from django.contrib.auth.models import User  # lint-amnesty, pylint: disable=imported-auth-user
 from django.core.files.uploadedfile import SimpleUploadedFile
 from django.db.models.signals import post_save
 from django.urls import reverse