Updated mediawiki/extensions/Wikidata
Project: mediawiki/extensions/Wikibase  0e7d8aead7f0177c532c89eee7d66fc0548e17e6

Improve phpdoc in ChangeHandlerTest and improve class ref

Change-Id: I303a4ca6b475a88e4d17cde4446d74f6e15d50d2