c87da91757
In the past we had used an openstack-manuals tool to manually generate config option tables that would then be included into driver config documentation. With the move of documentation in-tree and the deprecation and removal of that tool, we have ended up with options that are no longer being updated when drivers change, or maintainers are left manually updating the existing tables. This addes a sphinx extension to use a new config-table directive to automatically pull in config options from the source so we no longer need to perform any manual action to pick up changes. Change-Id: I625fb96229001c326ed2400155e2d067279a400e