Monkey patch original current_thread _active

Monkey patch the original current_thread to use the up-to-date _active
global variable. This solution is based on that documented at:
eventlet/eventlet#592

Change-Id: I113aaefc33b4b10dd037fc2ef00fc5f507be8b22
Closes-Bug: #1863021

Author: Corey Bryant

networking_mlnx/cmd/eventlet/__init__.py

@@ -13,3 +13,9 @@
 import eventlet
 
 eventlet.monkey_patch()
+# Monkey patch the original current_thread to use the up-to-date _active
+# global variable. See https://bugs.launchpad.net/bugs/1863021 and
+# https://github.com/eventlet/eventlet/issues/592
+import __original_module_threading as orig_threading  # pylint: disable=C0413  # noqa
+import threading  # pylint: disable=C0413  # noqa
+orig_threading.current_thread.__globals__['_active'] = threading._active