Update git submodules
- Update BlueSpiceGroupManager from branch 'master' to 5b7707af8cd1e2f8058ef9084bfb182d3cbb1353
- Localisation updates from https://translatewiki.net.
Change-Id: I4c483a7a664848ac3937972f263fcb6086b466ee
- Localisation updates from https://translatewiki.net.