Test Suite faillure: importlib race condition

[hsmett]

Example:

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ERROR: test_tiny_mce_assets_2_SAMEORIGIN (creme.creme_core.tests.views.test_static.StaticViewTestCase)
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Traceback (most recent call last):
  File "/home/circleci/.pyenv/versions/3.9.13/lib/python3.9/unittest/case.py", line 59, in testPartExecutor
    yield
  File "/home/circleci/.pyenv/versions/3.9.13/lib/python3.9/unittest/case.py", line 592, in run
    self._callTestMethod(testMethod)
  File "/home/circleci/.pyenv/versions/3.9.13/lib/python3.9/unittest/case.py", line 550, in _callTestMethod
    method()
  File "/home/circleci/venv/lib/python3.9/site-packages/parameterized/parameterized.py", line 533, in standalone_func
    return func(*(a + p.args), **p.kwargs)
  File "/home/circleci/creme_crm/creme/creme_core/tests/views/test_static.py", line 14, in test_tiny_mce_assets
    response = self.client.get('/tiny_mce/tiny_mce_popup.js')
  File "/home/circleci/venv/lib/python3.9/site-packages/django/test/client.py", line 742, in get
    response = super().get(path, data=data, secure=secure, **extra)
  File "/home/circleci/venv/lib/python3.9/site-packages/django/test/client.py", line 396, in get
    return self.generic('GET', path, secure=secure, **{
  File "/home/circleci/venv/lib/python3.9/site-packages/django/test/client.py", line 473, in generic
    return self.request(**r)
  File "/home/circleci/venv/lib/python3.9/site-packages/django/test/client.py", line 714, in request
    response = self.handler(environ)
  File "/home/circleci/venv/lib/python3.9/site-packages/django/test/client.py", line 132, in __call__
    self.load_middleware()
  File "/home/circleci/venv/lib/python3.9/site-packages/django/core/handlers/base.py", line 40, in load_middleware
    middleware = import_string(middleware_path)
  File "/home/circleci/venv/lib/python3.9/site-packages/django/utils/module_loading.py", line 17, in import_string
    module = import_module(module_path)
  File "/home/circleci/.pyenv/versions/3.9.13/lib/python3.9/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1030, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1004, in _find_and_load
  File "<frozen importlib._bootstrap>", line 158, in __enter__
  File "<frozen importlib._bootstrap>", line 110, in acquire
KeyError: 139762603358016

See: python/cpython#91351
Might be solved with: python/cpython#94504

This issue will never be fixed for Python<=3.9 though.