[#69107720] Rotate cdn logs every hour.

Use cron.hourly to rotate the cdn logs every hour.
[#69107720] Process fastly logs every hour.

cron.hourly runs at 17 minutes past the hour. 13 minutes should be long enough
for the compression to finish.

The absent for the hour is required due to the unique way that
the `cron` type works http://docs.puppetlabs.com/references/latest/type.html#cron