Ensure that printer orientation is preserved

Ensure that printer orientation is preserved

After setting the printer name the initialization is no longer done for
a printer with a name. Instead doReinit() method is called to preserve
the orientation (set with setOrientation() method before calling
setPrinterName()). Before the orientation was changed back to default
when setPrinterName() method was called ignoring the orientation set.

Updated also the autotest because the case:
taskQTBUG4497_reusePrinterOnDifferentFiles() is no longer expected to
fail on Windows.

Task-number: QTBUG-26008
Change-Id: Ia6bc9ae14d79a646e61bfc97652f9f5af90738b3
Reviewed-by: Andy Shaw
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@nokia.com>