Load the appropriate yaml information when found (this formerly
did not work). Make sure teuthology --lock works with a downburst
entry in the yaml files. Document how this works in README.rst.
Fixes: #6921
Reviewed-by: Dan Mick
You can use --os-type as an argument when not running teuthology
tests but instead just using teuthology-lock. This adds the ability
to also use --os-version so you can specify the version of the
distro without having to run an actual test with a yaml like you
normally would have had to do setting os_version in the yaml.
Signed-off-by: Sandon Van Ness <sandon@inktank.com>
