fixes Bug 1083901 - refactor Ceph out of the picture

we're not gonna use Ceph, but the BotoS3 storage classes will still be useful to us.  Let's remove the word "ceph" and move to there being only one bucket.
So I would be fine w/ removing this for now, I don't think there's a need to show example collector config using S3 quite yet, once we get it figured out for crash-stats we can do so.