Merge branch 'stable-3.2'

* stable-3.2:
  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: I40a59490a898a1774918e48d174c1066c3059805