This is a followup from elastic/elasticsearchelastic/elasticsearch#21590 and needs to be committed first or at the same time since netty_3 is removed Original commit: elastic/x-pack-elasticsearch@131d74dd6b
This change flattens the directory structure, both for the elasticsearch specific directories, as well as within the elasticsearch x-pack plugin. closes elastic/elasticsearch#2957 Original commit: elastic/x-pack-elasticsearch@45891a4632
Original commit: elastic/x-pack-elasticsearch@2018bb5f9f