This test case is intended to test the updating of various links
tables using a LinksUpdate object, based on the information in
a ParserOutput object.
Patch set 3: Suggestions by Aaron:
factored assertSelect() out into MediaWikiTestCase.
Force sorting of result set under testing.
Change-Id: I2d01e67ee7396080a04e5dff637aca0dc159c65d
