Fixed #21500 -- Removed imports of deprecated utils.importlib

# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

from __future__ import absolute_import  # Avoid importing `importlib` from this package.

import os

import signal

import sys

from django.conf import settings

from django.core.signals import request_finished

from django.utils._os import upath

from django.utils.importlib import import_module

from importlib import import_module

from django.utils import six

try:

    from django.utils.six.moves import _thread as thread

# files to search for such a header to decode the source file content

from __future__ import unicode_literals

import importlib

import inspect

import os

import re

from django.test.utils import (override_settings, setup_test_template_loader,

    restore_template_loaders)

from django.utils.encoding import force_text, force_bytes

from django.utils import importlib, six

from django.utils import six

from django.views.debug import ExceptionReporter

from .. import BrokenException, except_args