Update git submodules
- Update extensions/DiscussionTools from branch 'REL1_40' to effd0ce7cec2463039e5a6a906e3b78155f25c30
- Localisation updates from https://translatewiki.net.
Change-Id: I1c7e767dab256f7fc62b475b898bd074cc537aae
- Localisation updates from https://translatewiki.net.