Merge branch 'stable-2.16' into stable-3.0

* stable-2.16:
  Upgrade elasticsearch-rest-client to 7.3.2
  Add deleteChanges to list of supported permissions
  Remove obsolete permissions from gr-access-behavior
  Update git submodules
  Update git submodules
  Allow admins to index a change even if the branch is not Readable for them

Change-Id: I2d1b92e6895f43ab55b48ae3dca3260d87a26971
tree: 8d70c3d842821047664b6a544044fb7fce7b5dd5
  1. java/
  2. javatests/