Added tests for save, update and delete methods for tasks in task repository
Added tests for save, update and delete methods for tasks in task repository

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