Remove ability to select a vendor as a client on a client (sell) contract

Summary:

We are finding once again that vendors are being selected as the client contracts. We are in the midst of obtaining a list for all current contracts effected. An example is contract 1. (Name of Client) is the listed customer. That client number does not exist in OSC. Looking at the vendor profile, 11(sampleonly) is the vendor Registry ID. We cannot have vendors being listed as clients and need to have this corrected. The project team should only be able to select a client account that has been Approved in OSC.

The goal is

Remove ability to select a vendor as a client on a client (sell) contract.