Update the tox configuration to pull in the openstack
upper-constraints.txt when running releasenotes. This will
fix the releasenotes job that is currently failing due to
a new version of sphinx. Additionally this change includes
updates from puppet-modulesync-configs.
Change-Id: If1b80bbc6fe5bf1c8f49659891add50a5ebcf997
ReNo [1] is the release management tool in OpenStack.
This patch adds the basic structure to start using it.
* Update .gitignore
* Add a basic note "use-reno"
* Add releasenotes/ dir and basic files
* Add python files: setup.cfg, setup.py, test-requirements.txt and
tox.ini.
[1] http://docs.openstack.org/developer/reno
Change-Id: Ide7c53a7b25a1c0ef4966f60f6fc6bf07f636c83