NOJIRA Bring default production.yml in line with real production defaults

Unnecessary configuration is as much a time-bomb as unnecessary code. Whenever possible, we want to control defaults via code releases instead of needing to compare-delete-add-or-change settings by hand on every server. Otherwise we increase the chance of unexpected failures on release.

Currently our shared servers have a lot of shared "production.local.yml" that can be consolidated safely in GitHub. This PR tries to do that.

If it's merged, the obvious follow-up task is to add production.local.yml cleanup to our Release-Specific tasks.