patterns ecs-v1 to use host.name instead of host.hostname

[jguay]

At the moment the default patterns coming from ecs-v1 use host.hostname (same is defined for elasticsearch ingest node)

ECS documentation for host list both host.name and host.hostname

However most integrations currently use host.name so Kibana visualizations/dashboard tend to use this field causing them not to be usable when host.hostname is used

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Workaround solutions :

• add a second field host.name on logstash pipeline (or elasticsearch ingest node pipeline) at ingestion time to have both fields and be able to use common visualizations
• add a runtime field to add host.name to the indices (and index templates)