Allow admin to select Company Person Connector upsert key

Need the ability to select  more than just the email address as the upsert key on the the Company Person connector job.  Probably works great if you have clean upstream Contact data, but unfortunately we don’t and it’s out of CS control at this point.  Getting a lot of “duplicate” failures in the sync job because, yes, we have duplicate contacts on SFDC records.  But because of these duplicate failures, the “wrong” contacts are getting synced to Company Person causing discrepancies.

I believe there are other admins out there with a similar need, for various use cases.

Should be up to the Admin to select the Upsert Key/Key Combination for their particular environment.