Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  f210c726c8bc43a664d04a1b1c2d6fbda4f836c3

Add @group Wikibase to all tests

This is needed to run all of them on travis which uses
phpunit --group Wikibase to run tests.
This makes the number of executed tests climb by 217
on my test VM.

Change-Id: Id5004d52f2b94e5ae614215ea73bfae72436f764