Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  aa6a3f584f08e1913ef594c07b57b74733fdfd2e

Make PropertyContentTest work with DataModel 1.0

In DataModel 1.0 Properties do not contain claims any more so we have to
move all claim related stuff into the ItemHandlerTest.

Change-Id: Ib3d761912e5721e63d14e4565c8a272ab4164f50