Merge branch 'stable-3.1' into stable-3.2

* stable-3.1:
  Update git submodules
  Update git submodules
  Update git submodules
  Update git submodules
  Elasticsearch: Remove support for EOL 6.6 version
  ElasticContainer: Upgrade V7_8 to elasticsearch 7.8.1
  ElasticContainer: Upgrade V6_8 to elasticsearch 6.8.11
  Fix gr-hovercard-behavior under Firefox
  Add entries to .gitignore of stable-3.0 that exist on master

Change-Id: I4c28a0671f3927b99f01639e80fc7bfbd3059213
tree: 2578ac658d2d4e3fe057029ad56e2d9c7b637321
  1. java/
  2. javatests/