Merge branch 'stable-2.16' into stable-3.0

* stable-2.16:
  ElasticV7QueryProjectsTest: Use V7_4
  Add support for Elasticsearch version 7.4.*

Change-Id: I2f7ddd862910aaf34de1dd9695a391bb7e459708
tree: 34b8a46db7aba46e0326adf1bff607dd3bb370d1
  1. java/
  2. javatests/