qttest: Fix updating test view when changes happen in Projects

Change-Id: I9ee4ca7643ffd04dbf466412c71ec5471de1eb1c
Reviewed-on: http://codereview.qt.nokia.com/3904


Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Bill King <bill.king@nokia.com>
Reviewed-by: Eike Ziller <eike.ziller@nokia.com>