MW 1.24+ / Hotfix for missing Redirect caused by bug 62856

MW-core has yet to provide a working solution (which it hasn't)  but to avoid further delay (due the ContentHandler on redirects #212 ) and to fix the problem `forceToUseParser` is added to avoid the `ContentHandler` usage during the Update.

SimplePageRedirectRegressionTest is running again on MW 1.24+
I think the two liner is better. With the one liner, I find it odd that `forceToUseParser` changes the state of the `$contentparser`. It's hiding the side effect.

> the ContentHandler sucks

Perhaps, though that is no reason to abuse fluent interfaces here.