Unable to use WSDL with imports as contract interface for service, component, or reference in SwitchYard

Issue

• We need to use a WSDL contract defined in multiple files (because of different namespaces) as a reference service in a SwitchYard project.
• When creating the reference the WSDL shows up but can not be selected because no ports are defined in the file.

• In fact the ports are defined in a second WSDL imported by the first one as follows, but SwitchYard seems not to see them:

  stockquoteservice.wsdl (<wsdl:import>, <wsdl:binding>, <wsdl:service>)
      -> stockquote.wsdl (<wsdl:types>, <wsdl:message>, <wsdl:portType>)