Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  0db6ed1899e88f828163eb428ec5337dd45dd646

Set global $wgContLang for CopyrightMessageBuilderTest

this test is failing on sometimes on travis, for non-english wikis,
due to not controlling for the global variable.

Change-Id: I8acdb23db7e1fcb3a284c6ddc6f70d182981b0d3