Updated openstack/openstack
Project: openstack-dev/pbr  fc474b731b6849ef59488d5717214d49a2f9569c

autodoc: allow to exclude modules from auto-generation

Some projects need to not generate and publish documentation for some of
their modules. This patch adds an option to list modules that should be
excluded from documentation auto generation.

Change-Id: I944a6ad5faa113ca26eb32b78be1bfc41e1387ef