Docs generation shouldn't treat a warning as an error

[Lucas Alvares Gomes]

When running "tox -edocs" it fails with:

Warning, treated as error:
README.rst:None: WARNING: nonlocal image URI found: http://governance.openstack.org/badges/networking-ovn.svg

ERROR: InvocationError: '/home/lucas/Projects/networking-ovn/.tox/docs/bin/sphinx-build -W -b html doc/source doc/build/html'
_____________________________________________________________________________________________________ summary _____________________________________________________________________________________________________
ERROR: docs: commands failed

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/455182

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/455182
Committed: https://git.openstack.org/cgit/openstack/networking-ovn/commit/?id=ea5f9b662a950f9699a89d5cce7287bf075daaad
Submitter: Jenkins
Branch: master

commit ea5f9b662a950f9699a89d5cce7287bf075daaad
Author: Lucas Alvares Gomes <email address hidden>
Date: Mon Apr 10 10:30:26 2017 +0100

    Docs: Do not turn warnings into errors

    This patch is removing the -W flag from the "sphinx-build" command in
    tox.ini. When this flag is set all warnings will be treated as erros and
    cause the documentation generation to exit with status 1.

    Change-Id: I4d11c25bda3faad4f9fb5a25ac2c99d55276891a
    Closes-Bug: #1681364

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/networking-ovn 3.0.0.0b1 development milestone.