Some corrections were made to consider specific client ports indicated in the body of the service-create rpc. However, client port are still not considered in the case of WDM Tsp and also when the constraint is expressed as a node-id constraint.. This shall be corrected. The constraint that can expressed in the service request can be the node-id or the port-id. It MUST be considered in the path calculation.

Acceptance criteria : the code does not bring regressions, functional tests are updated to check the port_id/node-id is correctly considered (constraint on one side, no constraint on the other side)