Title: Allow Component Type side file to override defaults for service/reference

Description: One use of CT side files is to override defaults used for figuring out what is a service v. reference. It should be possible to specific whether a partnerlink is a service or a reference using the CT side file.

Proposal: Two possible solutions are: 1) extend the CT syntax to specific the partnerlink for a service/reference 2) require that a service/reference name specified in the CT side file correspond to the partnerlink name.