Add setDefault to servicefw
Add setDefault to servicefw

Change-Id: I0e8c432a9148a590c06ca17236421b13a01373a9
Reviewed-on: http://codereview.qt.nokia.com/2661
Reviewed-by: Andrew Stanley-Jones <3158427ccc6af852b3b80aff3045d95d14f60128@nokia.com>

qtproject/qtsystems,qtproject/qtsystems