* stable-3.1:
ElasticV6QueryChangesTest: Align with changes done in V7
Update git submodules
Update git submodules
ElasticV6QueryChangesTest: Close indices after test
Update git submodules
Switch PatchListCache to using legacy cache backend
Replace guava caches with caffeine
Fix undefined branch in create-destination-dialog
Add support for Elasticsearch version 7.5.*
Change-Id: I436f3a67ce12ed618b48c30b02af5028b822d767