Fixes bug 1110003 - Correctly remove namespace from returned results.

@peterbe r?
Do all tests need this? It seemed as if before only the `test_get_indexes()` needed it. 
We should be very careful with "polluting" the `setUp` and `tearDown` with excess. 

If only some tests depend on it, I would use a `finally:`. And it multiple tests needs it consider writing a private method. Or perhaps a class method decorator.