Run test-kitchen with Travis + AWS

[patcon]

Would love to have test-kitchen integration tests reflected in the travis badge. Any objections?

So long as you're the sort of maintainer who's moderately conservative with who you give push access on the repo, happy to set it up so that it runs against master and the PR branches in the canonical repo itself

Lemme know!

(I'd also like to get it testing against debian, but that can be another PR)