don't create empty set element in tests.xml
don't create empty set element in tests.xml

arcean/controlpanel,arcean/controlpanel,harmattan/meegotouch-controlpanel,harmattan/meegotouch-controlpanel,harmattan/meegotouch-controlpanel,arcean/controlpanel,arcean/controlpanel,arcean/controlpanel,harmattan/meegotouch-controlpanel