Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  c859270d6b3423a3a05206677f68b6caf31d94df

Remove hacks from jenkins entry point.

Wikibase.php now activates both the client and the repo extension.
This allows all tests to be run in a single pass.

Change-Id: I8fc331f91af096e98790ebd5d8e7a0fabb60cd85