Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  835edd6f702655cebf7b955d3d35572069489fa0

Converted Ruby pageObjects to modules

This is to use composition rather than inheritance and is more like what
the other projects are doing.

Change-Id: Ifffb996b8041527c4f65986a119aebb0e2d77871