Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  6749856242063b6e2ceddd62ca6ee1d336430e17

Skip LuaWikibaseLibraryTest if repo not present

Scribunto_LuaWikibaseLibraryTest needs to access the repo
database, which it can't if the client is running stand-alone.

Change-Id: Ife4a95f85504777db5cf195f07aa541d394a664a