Merge branch 'stable-2.16' into stable-3.0

* stable-2.16:
  Report to Checks when the build starts
  ElasticContainer: Upgrade V7_6 to elasticsearch 7.6.2
  ElasticContainer: Upgrade V6_8 to elasticsearch 6.8.8

Change-Id: I042c4b97af9642240e7e188e70081bfe22cc6b0b
tree: 9ad8c0244f041d89e15a00faa27c496906c80b11
  1. java/
  2. javatests/