QtIFW

Sanitize QDebug output

Prefer using the stream operator logic instead of using
QString::fromLatin1. Add a noquote() where a QString should be printed
without any quotes/escapes.

This also fixes the tests with Qt 5.5, where QString's are further
escaped.

Change-Id: Ie3afd14b9355101d3c0b52f30f66ec759c76526c
Reviewed-by: Karsten Heimrich <karsten.heimrich@theqtcompany.com>