Use the correct parent path for the renamed file when creating
QFileInfo. It must be a path to the parent directory, not to the
root directory of the model.
Modify tst_QFileSystemModel::setData() to test renames in subdirs
of the root directory of the model.
Change-Id: I69d9e3a937616857a81617791ed118af3f6eea05
Task-number: QTBUG-52561
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
Reviewed-by: Lars Knoll <lars.knoll@theqtcompany.com>
e27fae353c