MUR/ADRs: document_highlights limits to only 3 document hits (Bug)

[patphongs]

What we’re after

Currently the document_highlights only returns a max of 3 hits and a max of 5 fragments. We need to return all the hits so that the user can get the full dataset. We need to understand how we can remove the limit for hits from document_highlights.

Elasticsearch highlight documentation: https://www.elastic.co/guide/en/elasticsearch/reference/current/highlighting.html

Example:
When searching query “Reason to believe” and doc_category_id=1 for MUR 4530, it returns 3 matching document hits, but there should be more, at least 7. This is the API call: https://api.open.fec.gov/v1/legal/search?case_no=4530&case_doc_category_id=1&type=murs&hits_returned=20&from_hit=0&q=%22Reason+to+believe%22&api_key=NICAR16

Action item(s)

• Determine how these limits are being set
• Remove all document limits, as appropriate
• Ensure all relevant documents will appear, no documents with a given type will be excluded from the search results

Completion criteria

• All relevant documents are appearing in search results

References/resources/technical considerations

• Is there a performance issue when returning all results?
• Do size parameters in elasticsearch settings help with returning results?