It would be good if we could replace ```/usr/bin/chef-client``` here with ```@chef_config[:chef_client_path] || /usr/bin/chef-client```. It looks like we still don't have a default for chef_client_path, which was added in [CHEF-2715](https://tickets.opscode.com/browse/CHEF-2715). 

I was thinking of another related issue, but it turns out it was [CHEF-3844](https://tickets.opscode.com/browse/CHEF-3844) which is a test-kitchen bootstrap issue due to using install.sh directly and not having this kind of behavior.