Fix test which is broken when running Wikibase without ULS

Also adds a todo for how to further decouple Wikibase from ULS and fixes some usage of assert.equal
where assert.strictEqual should be used in QUnit tests.

Change-Id: I27ccab642725c85140ad517b2d37c60887464ddc
Merge "Fix test which is broken when running Wikibase without ULS"