Fixes cinder-volume service startup on Windows

The Windows service fails due to missing non-blocking IO features
in eventlet. This fix adds a conditional path on Windows to execute
the service accordingly.

This bug had already been fixed by this this commit:
https://review.openstack.org/#/c/44744/ but it had been reverted
here, causing the Windows service to fail again
https://review.openstack.org/67031

Fixes bug: #1219896

Change-Id: I46c6b332e614b6a84ec8372dbec3ee9fb09336de
Use debug level logging during unit tests

When unit tests fail we need to debug, so we should have debug level logging on.
We use fixtures FakeLogger during testing, to enable debug logging pass
in log level as a parameter.

http://bazaar.launchpad.net/~python-fixtures/python-fixtures/trunk/vi
ew/head:/lib/fixtures/_fixtures/logger.py#L68

Taken from nova (Change-Id: I70790aa39c0774726de71e5fa5751c45e7e34ffd)

Change-Id: I24bcce3a9a50322f20f06670d1fe95d929aa2e72
Merge "Use debug level logging during unit tests"
Merge "Fixes cinder-volume service startup on Windows"