Added tests for delete_cached
Added tests for delete_cached

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