Ryan Ernst 7a7bd6086a Mappings: Remove ability to disable _source field
Current features (eg. update API) and future features (eg. reindex API)
depend on _source. This change locks down the field so that
it can no longer be disabled. It also removes legacy settings
compress/compress_threshold.

closes #8142
closes #10915
2015-05-05 22:04:18 -07:00
..