Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  8977d6c577228fe088ed1e131e50bb5a9744e7fc

Remove usage of deprecated Entity methods

This includes fixing two of the issues listed here
https://gerrit.wikimedia.org/r/#/c/173724/1/lib/includes/store/sql/TermSqlIndex.php

Change-Id: I42b15469d765d40c5db21b1fc956141bcb0b0a75