Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  2604e7f495c996aa10587d9a4d6648cef9aca431

Revert "Update TravisCI build config to no longer exclude ChangeHandler tests"

This reverts commit 8e372f50f29b6cf229f801880c2b5bab44686dad.

Change-Id: Ia6e9d7a2fc7ff7e66197fb9515cfa2723bae0632