Backport cookbooks.opscode.com -> supermarket change to 11-stable.

* Backports https://github.com/opscode/chef/commit/9c80e5efc8663302c3faf8bf06e3af9eac8edceb

See the conversation [here](https://github.com/opscode/chef/commit/7e829c812b65465c8686294c9796c353d1b314a9#commitcomment-8177546) for details. 

/cc: @jeremiahsnapp, @opscode/client-engineers