Support controllers out of bundles

Need this to support [bundleless application code][1]. Currently using [my own bundle][2] for that, but would be nice to have this in the bundle itself.

[1]: http://elnur.pro/symfony-without-bundles/
[2]: https://github.com/elnur/ElnurTemplateGuesserBundle
Are you sure about this one? It's done the same way in 3 other places in this test case. If I do what you suggest, it will be inconsistent.