問題の事象
$ bundle exec kitchen converge foo-bar
-----> Starting Kitchen (v1.3.1)
-----> Creating <foo-bar>...
Creating <>...
If you are not using an account that qualifies under the AWS
free-tier, you may be charged to run these suites. The charge
should be minimal, but neither Test Kitchen nor its maintainers
are responsible for your incurred costs.
>>>>>> Create failed on instance <foo-bar>.
>>>>>> Please see .kitchen/logs/foo-bar.log for more details
>>>>>> ------Exception-------
>>>>>> Class: Kitchen::ActionFailed
>>>>>> Message: The key pair 'negito6' does not exist
解決
キーペアの Region 間違えてた。
キーペアの作り方: http://docs.aws.amazon.com/ja_jp/AWSEC2/latest/UserGuide/ec2-key-pairs.html (リージョン選べってちゃんと書いてある)