[M3DB] HTTP Json API of Query returns empty results when Query JSON Body is wrong

[asafm]

1. Write tagged data point, say to namespace default, with tag city: new-york
2. Read it using 9003:/query to dbnode, having a range which includes the timestamp inserted in step 1.

{
  "namespace": "default",
  "query": {
    "term": {
      "field": "city",
      "value": "new_york"
    }
  },
  "rangeStart": 0,
  "rangeEnd": 1595325840
}

Notice the error in the query (term was replaced with value).

Response: 200 OK, with

{
    "results": [],
    "exhaustive": true
}

Expected: 400 Bad Request with error stating term is required in query.term

[robskillington]

Thanks for filing this @asafm, we've merged a fix for returning an error on an unknown field being used with these raw DB APIs.