This class represents a service request coming into WSIF. It
contains the incoming WSIF message, context information (in the
form of a WSIF message) as well as other information (service ID,
port name, operation name etc.).
author: Sanjiva Weerawarana author: Paul Fremantle
Set the name of the port within the service that is to be used.
If not set the either the service must have only one port/portType
or someone must be able to figure out the port from the service ID.