just another way to do what ASN does, the KService::DBusWait mode was
not used too. with this change however all of the process setup code is
moved to a seperate class and the responsibility of KLauncher about ASN
is reduced (ASN now works better for process that fork but if application
claims ASN support and does not send ASN finish then the timeout will be
reached)
Signed-off-by: Ivailo Monev <xakepa10@gmail.com>