Comment 4 for bug 1075838

Reviewed: https://review.openstack.org/15541
Committed: http://github.com/openstack/cinder/commit/4e619fbef8671697bfec8e752818944c9f96cd72
Submitter: Jenkins
Branch: master

commit 4e619fbef8671697bfec8e752818944c9f96cd72
Author: Vishvananda Ishaya <email address hidden>
Date: Tue Nov 6 20:12:00 2012 -0800

    Fix 401 from auth_token middleware

    The openssl popen call to verify the token returns an error code
    of 2 when a file doesn't exist. Normally this is caught and the
    relevant file is downloaded, but monkeypatching os causes this
    error code to be eaten and cinder to return a 401. Note that this
    is likely a race condition that depends on exactly when greenthreads
    are switching that is causing the return code from Popen to get
    overwritten.

    It is possible that this is exposing an underlying bug in eventlet
    but the workaround is simply to make sure that we don't monkeypatch
    os.

    Fixes bug 1075838

    Change-Id: I69ba75136e32e95c6fdf108f0c4fe21a5e3bdbe6