Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  8436931baf3076fda3c300aa518c645f642db69e

Fix round trip tests in MwTimeIsoFormatter tests

This part of the tests was never exectued. This looks like a
mistake to me. If I turn it on it runs with no problem.

Change-Id: I76f3cdafb38be1964e6ed91b617911ee123efd28