[mock_uss] Have gevent monkey-patch early in mock_uss (#531)

* Have gevent monkey-patch early in mock_uss

* Satisfy `make format`

monitoring/mock_uss/__init__.py

@@ -1,6 +1,13 @@
 import inspect
 import os
 from typing import Any, Optional, Callable
+
+# Because mock_uss uses gevent, we need to monkey-patch before anything else is loaded.
+# https://www.gevent.org/intro.html#monkey-patching
+from gevent import monkey
+
+monkey.patch_all()
+
 from loguru import logger
 
 from monitoring.mock_uss.server import MockUSS