Fetch result data via Elasticsearch result-data-sample documents instead of result.json files

[portante]

We now have result data indexed at the sample level from which we can derive the entire data set contained in a result.json file, which is currently used by the dashboard.

Let's see what it would take to change from loading a file to querying the result-data-sample documents in Elasticsearch.

[anishaswain]

@gurbirkalsi I believe this is resolved now. Right?

[gurbirkalsi]

Resolved with PR #41