C-Haines: CORS errors requested data from object store

[conbrad]

Actual Behaviour

All requests for json/kml files from object store result in CORS errors.

Steps To Reproduce

1. Go to C-Haines
2. Choose a date with data
3. See errors in dev console

Screenshots

If applicable, add screenshots to help explain your problem.

Expected Behaviour

Requests for json/kml from object store should succeed.