Configure mock logger to return a valid log level for getEffectiveLevel()
to prevent TypeError when comparing with logging.DEBUG constant.
The issue was that ModelCache._log_cache_state() checks
self._logger.getEffectiveLevel() > logging.DEBUG, and when the logger
is a MagicMock without configuration, getEffectiveLevel() returns another
MagicMock, causing a TypeError when compared with an int.
Fixes all 4 test failures in test_model_cache_timeout.py
Co-authored-by: lstein <111189+lstein@users.noreply.github.com>
b7afd9b5b3