Merge branch 'stable-3.4'

* stable-3.4:
  HostKeyProvider: Set algorithm to rsa for legacy host key
  Honour {httpd,sshd}.gracefulStopTimeout in gerrit.sh
  SSH transport: Re-enable weak kex algorithms
  Elasticsearch: Discontinue EOL version 7.5 support

Change-Id: If0b996cb18b8fa7cc11a6b33d9b3d1fe5cae07bb
tree: 44a099a86570a902914d5e8d404e03c0d65b95af
  1. java/
  2. javatests/