Add chef_version metadata
Add chef_version metadata

Also remove Chef 11 required compatibility checks for the supermarket metadata

Signed-off-by: Tim Smith <764ef62106582a09ed09dfa0b6bff7c05fd7d1e4@chef.io>

sensu/sensu-chef,cwjohnston/sensu-chef,klamontagne/sensu-chef,cwjohnston/sensu-chef,sensu/sensu-chef,klamontagne/sensu-chef