Allowed some auth tests to be run independently

from django.contrib.auth import SESSION_KEY, REDIRECT_FIELD_NAME

from django.contrib.auth.forms import (AuthenticationForm, PasswordChangeForm,

                SetPasswordForm)

# Needed so model is installed when tests are run independently:

from django.contrib.auth.tests.custom_user import CustomUser  # NOQA

from django.contrib.auth.tests.utils import skipIfCustomUser

from django.contrib.auth.views import login as login_view