params.BackupsMetadataResult.UpdateFromMetadata -> apiserver/backups.ResultFromMetadata.
Merge pull request #1264 from ericsnowcurrently/backups-break-cycle

Drop an import-cycle-waiting-to-happen from apiserver/params.

Factor out the UpdateFromMetadata method of params.BackupsMetadataResult into apiserver/backups as ResultFromMetadata. This helps avoid the possibility of import cycles with anything backups imports since apiserver.params is imported in all sorts of places you wouldn't expect.

(Review request: http://reviews.vapour.ws/r/578/)