Updated mediawiki/extensions
Project: mediawiki/extensions/CirrusSearch  2fef80cb46493fbad8bcc19166ec4d96756bedb8

Random searches: only return page from Elasticsearch

Doing source filtering ends up with higher CPU load on ES.
While doing it this way will result in a database query
per Special:Random hit, it's what we did without ES so it's
no big deal.

Change-Id: Ia1d7f26c8646ffbca4880701d21f21d6d225e555