886d8c6dab
With pbr 2.0 and Sphinx 1.5, the setting for treat sphinx warnings as errors is setting warning-is-error in build_sphinx section. Migrate the setting from the old warnerrors one. There are some invalid docstrings. These are cleaned up. Change-Id: Ic6a028bab428b23255f36e5b2d64ee8d4d32978d