1. Modules in oslo_service uses eventlet, but they are not monkey_patched.
This patch add monkey_patch to all unittest code.
The original unittest code does not really work, it muddles through.
2. According to what Elena Ezhova said, there is a bug about patching os module on
windows [1]. As a result, the monkey patch bypass os module on windows.
3. subprocess module is not monkey_patched by default, we should use
eventlet.green.subprocess explicitly.
4. test_stop_immediately() does not work as expected, the reason it passes is because
foo() never get a change to run, if foo get a change to run, the blocking version
time.sleep() in it will block the main thread. We should give it a chance to run
so that the test counts.
[1] https://bitbucket.org/eventlet/eventlet/issues/132/eventletmonkey_patch-breaks
Change-Id: Ic586be571b78fc096f77aadc6c9f3c85e4f26c80
Signed-off-by: apporc <appleorchard2000@gmail.com>
f5d273858c