Make "sys.modules.get('importlib.util')" with "import importlib.util" in test_lazy.py

Without this `./python -m test test_importlib` fails at `test_lazy`
although `./python -m test test_importlib.test_lazy` perfectyl succeeds.
That is becasue some other tests likely manipulates `util` making the
above two out of sync.

Author: QEDady

Lib/test/test_importlib/test_lazy.py

@@ -10,6 +10,9 @@
 from test.support import threading_helper
 from test.test_importlib import util as test_util
 
+# Make sure sys.modules[util] is in sync with the import.
+# That is needed as other tests may reload util.
+sys.modules['importlib.util'] = util
 
 class CollectInit: