Handle elasticsearch 0.90.x response for mappings and settings
Handle elasticsearch 0.90.x response for mappings and settings

Old versions of elasticsearch return the mappings and settings directly
in response to a request to _mappings and _settings, instead of wrapping
them in an object.

If the top level key isn't mappings or settings, just return the
contents directly.

rboulton/es_dump_restore,patientslikeme/es_dump_restore