Comment 2 for bug 1708167

Reviewed: https://review.openstack.org/490021
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=7a895c67b1c2be1a4be17203c06f023aaf371546
Submitter: Jenkins
Branch: master

commit 7a895c67b1c2be1a4be17203c06f023aaf371546
Author: Chris Dent <email address hidden>
Date: Wed Aug 2 14:19:34 2017 +0100

    [placement] Avoid error log on 405 response

    Treat HTTPMethodNotAllowed as a WSGI application rather than exception
    so that it is not treated as an uncaught exception and logged as an ERROR
    in the PlacementHandler before being caught in the FaultWrapper middleware.
    Bad method detection is happening outside the context of WebOb wsgify
    handling (which automatically catches Webob exceptions and transforms
    them into appropriate responses) so we need to do the transformation
    ourself.

    This will help to avoid spurious noise in the logs. See the bug report
    for more detail.

    Change-Id: I6de7c2bffb08f370fcfbd86070c94263ee202f93
    Closes-Bug: #1708167