Code review comment for lp:~mmoulton/cloud-init/chef

A couple things I'd like to see fixed
- you added 'environment' and 'node_name' configuration variables, but did not add defaults. That means a cloud-config that would previously have worked will now fail in the rendering of that template. (I think). Please supply default values for those.
- please try to keep lines to less than 80 chars. Some of the lines added are well over that.
- you've changed 'validation_cert' to 'validation_key', and the example even suggest different formatting going into the same file (/etc/chef/validation.pem). Why is that?