Qt4RunConfiguration: Do not mark unit tests as terminal apps

QT += testlib automatically adds CONFIG+=console, which we use to
decide whether the app should be run with a terminal. Typically though
those apps do not need a terminal since they are just unit tests without
any need for input.

Task-number: QTCREATORBUG-9475
Change-Id: I98667cb17a6696a4a4ffd195280e816d84d33581
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Reviewed-by: hjk <hjk121@nokiamail.com>