Update git submodules
- Update BlueSpiceEchoConnector from branch 'master' to 6162418e2766aa38250860887ac4d37620f18672
- Localisation updates from https://translatewiki.net.
Change-Id: I7ff8596000333ea204c33895b01833e80f3cc37c
- Localisation updates from https://translatewiki.net.