Nik Everett 28df7ae5ed
Support multiple metrics in top_metrics agg (backport of #52965) (#53163)
This adds support for returning multiple metrics to the `top_metrics`
agg. It looks like:
```
POST /test/_search?filter_path=aggregations
{
  "aggs": {
    "tm": {
      "top_metrics": {
        "metrics": [
          {"field": "v"},
          {"field": "m"}
        ],
        "sort": {"s": "desc"}
      }
    }
  }
}
```
2020-03-05 08:12:01 -05:00
..
2019-10-11 16:34:11 +03:00

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