Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  aef5e58fc15ad2bfc284f1a43b6f28c5ad97b8a2

Use mock in SpecialPageCopyrightViewTest

this fixes failure on travis, where the test
indirectly depended on content language setting.

We can use a mock and then not be concerned about
content language at all.

Change-Id: I60c0b201807b05d2b4e5847bfe4ccaed204cb86b