Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  97e4d2b50d109cde17f1df1edecb62f32e6c8a95

Introduces SpecialWikibaseQueryPage::CACHE_TTL_IN_SECONDS

This will set the caching time in the base class. Before, this has been done in all implementations
separately.
Also fixes an issue about a sometimes undefined variable in SpecialWikibaseQueryPage::showQuery.

Change-Id: Id99fb240744d2d49061dc7c7b1b43e9de143231f