Need Fastly key setup for production www.python.org

[frankwiles]

Hey Everyone,

We need to set the Fastly API Key so the app code can automatically PURGE when Pages and Downloads (and likely eventually other aspects of the site) are edited.

So ultimately pydotorg.settings.server needs to contain:

FASTLY_API_KEY = ''

This will likely need to be setup in Consul, so I wasn't sure exactly how to go about putting together a pull request for it.

[dstufft]

I just setup pillar data for the Fastly API key. You can use {{ pillar["fastly"]["api_key"] }} inside of a template to get the Fastly API key, and you need to add {dev,prod}.secrets.fastly to pillar/{dev,prod}/top.sls for any role that needs access to this data.