Get additional metadata for a Sample, from Elixir's Contextual Data Clearing House.

Example:
---
`/samples/ERS235564/contextual_data_clearing_house_metadata`

GET /metagenomics/api/v1/samples/SRS936701/contextual_data_clearing_house_metadata?format=api
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "data": []
}