For using opendev-tox-docs, jobs need to publish to a "html"
subdirectory, update the docs-site and specs jobs.
Update .gitignore for this.
Update python files to use yaml.safe_load to avoid a warning.
Remove unused docs environment from tox.ini.
Depends-On: https://review.opendev.org/682213
Change-Id: I8d7032a6e836ec26f347d16abd600514089a677b
Use a YAML file listing the projects to generate the specs.openstack.org
root page and an OPML file for all of the available RSS feeds.
These changes are based on the work of Maish Saidel-Keesing
<maishsk@gmail.com> in https://review.openstack.org/#/c/140041/
Change-Id: I828d65f10fb7608b59e3561cedc9553d4d96ee75