Fixes bug 1110003 - Correctly remove namespace from returned results.

@peterbe r?
Ah yeah sorry, I should have explained it. This is fixing a bug that caused the unit tests to fail, and that was not visible before. Basically this test creates the ``socorro_integration_test`` index but never removes it, causing following running tests to error out. 

So, unrelated to the change, but needed for the tests to pass. Sorry for the confusion!