This patch updates/adds the contributor documentation to follow the guidelines of the Ussuri cycle community goal[1]. [1] https://governance.openstack.org/tc/goals/selected/ussuri/project-ptl-and-contrib-docs.html Story: #2007236 Task: #38522 Change-Id: I0e2d1de8e96bbfe5964983d021eacc9e62265f86
1. Sync sphinx dependency with global requirements. It caps python 2 since sphinx 2.0 no longer supports Python 2.7. 2. Update some URLs to latest 3. Remove unncessary "==" Change-Id: I211039189a935e006dc77d3245486d72b7c104a9