Merge branch 'stable-3.0'

* stable-3.0:
  Fix creating comments on Firefox ESF
  Error Prone: Enable DateFormatConstant at ERROR severity
  Bazel: Stop unsigning jgit libraries
  Bazel: Rename jgit:server rule to jgit:jgit
  Bazel: Remove special handling of jgit source dependency
  Synchronize protobuf with version used in rules_closure
  Update rules_closure to latest version
  Upgrade elasticsearch-rest-client to 7.1.1

Change-Id: I567a6f07349be60eb09af885fd37ee71172386ff
tree: 6fac99b5ba0ad4b46408d07999ae2424b66f66e1
  1. java/
  2. javatests/