Test that returns also empty list with users.
Test that returns also empty list with users.

Scifabric/pybossa,inteligencia-coletiva-lsd/pybossa,jean/pybossa,geotagx/pybossa,inteligencia-coletiva-lsd/pybossa,OpenNewsLabs/pybossa,PyBossa/pybossa,PyBossa/pybossa,jean/pybossa,Scifabric/pybossa,geotagx/pybossa,OpenNewsLabs/pybossa,stefanhahmann/pybossa,stefanhahmann/pybossa