Merge branch 'stable-2.16'
* stable-2.16:
Update git submodules
Do not create postgresql index on an inexisting table
ElasticContainer: Remove unneeded environment setting
Remove redundant "testName" methods from Elasticsearch tests
ElasticVersionTest: Add supportedVersion asserts for V7_0
Add support for Elasticsearch 7
Allow to set Elasticsearch number of shards and replicas
Discontinue support for Elasticsearch 2.4.x
ElasticSetting.Builder: Make methods return 'this'
Add link to security documentation for Elasticsearch 6.5
ElasticVersionTest: Add missing tests for 6.5.x
Change-Id: Idf65e3086d3e5ac691e88bd9cc6b598ef395db6a
