Added @covers annotations.

I've added @covers annotations as these test only test the controller on a functional level. There are no assertions done on other elements, than the resulting output. This shows in detail the drop in coverage, without changing any tests.

Only as a little step before creating new tests, to validate to drop in coverage. As new tests will be with @covers per default.
![screen shot 2014-05-23 at 18 56 58](https://cloud.githubusercontent.com/assets/618940/3069523/1663bc50-e29d-11e3-93be-4ce6f7daabe4.png)
![screen shot 2014-05-23 at 19 04 44](https://cloud.githubusercontent.com/assets/618940/3069524/167e568c-e29d-11e3-8f06-abffc85b0e91.png)