Updated mediawiki/extensions/Wikidata
Project: mediawiki/extensions/Wikibase  626a7feaeef3655b4c228c548b43c79bbf50c3df

Move WikibaseExceptionLocalizer messages to lib

$message->exists() in WikibaseExceptionLocalizerTest does not
work when running tests in the client while the messages are
in repo.

Change-Id: Ib55d3430cc572b727c0e7621650de8ea4aa2b5a4