Statistics on metrics doesn't work

[To-om]

Request Type

Bug

Work Environment

TheHive 2.13.x

Problem Description

On statistics, metrics are all zero.

Complementary information

In ElasticSearch 2.x aggregations, field hold by nested object was directly accessible, with dot notation ("metrics.field").

In ElasticSearch 5, nested field is accessible with nested aggregation.

This issue is solved by TheHive-Project/elastic4play#35