Merge branch 'stable-3.0' into stable-3.1 * stable-3.0: Update git submodules Update git submodules Update git submodules Rely on a released version of gatling-git in stable branch ElasticVersionTest: Use latest V6 in V7 assertions ElasticContainer: Upgrade V6_8 to elasticsearch 6.8.12 e2e-tests: Add presentation links to documentation Change-Id: I44324407e0f944bc9d752c3cd4890b01bd4e7d59