update logger docs to include how to modify running fluentdpods

[Jonathan Chauncey]

http://docs-v2.readthedocs.io/en/v2.0.0-beta2/managing-workflow/platform-logging/

Should show how to modify fluentd so that you can add papertrail

[Vaughn Dice]

ping @jchauncey as to if this is still scheduled for the v2.0-rc1 milestone

[Matthew Fisher]

https://deis.com/docs/workflow/managing-workflow/tuning-component-settings/#customizing-fluentd