add new parameters for A/B testing of expiring loan notification

I added a few new parameters to enable a second version of the expiring loan notification template that includes a loan summary box.  Do you think you could test that this will work correctly with the B version of the Sendwithus expiring loan notification email?  

If it works, could you go ahead and push this to production and activate the Sendwithus A/B test for this template?