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:
https://github.com/eventlet/eventlet/issues/592

Change-Id: Ifc6420d927c0ce9e04ff3b3253e81a474591e9bb
Closes-Bug: #1863021

manila/cmd/api.py

@@ -20,6 +20,12 @@
 
 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
+import threading  # noqa
+orig_threading.current_thread.__globals__['_active'] = threading._active
 
 import sys
 

manila/cmd/data.py

@@ -18,6 +18,12 @@
 
 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
+import threading  # noqa
+orig_threading.current_thread.__globals__['_active'] = threading._active
 
 import sys
 

manila/cmd/scheduler.py

@@ -20,6 +20,12 @@
 
 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
+import threading  # noqa
+orig_threading.current_thread.__globals__['_active'] = threading._active
 
 import sys
 

manila/cmd/share.py

@@ -19,6 +19,12 @@
 
 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
+import threading  # noqa
+orig_threading.current_thread.__globals__['_active'] = threading._active
 
 import sys