Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  b5c7cd3b86ad1d5ebd32aa81eefd9c44dead6073

Avoid getDefaultInstance method name in tests

This is split from I04767f2 to make it easier to review.

Change-Id: I712432649c38e5e8cc3148e5c12001b1cf33c6ed