User pays a single payment from existing payment position via nodoInviaRPT
Scenarios:
- User pays a single payment with single transfer and no stamp that exists already in GPD
- User pays a single payment with no transfer and one stamp that exists already in GPD
- User pays a single payment with single transfer and one stamp that exists already in GPD
- User tries to pay a single payment with single transfer and no stamp that exists already in GPD in invalid state
- User tries to pay a single payment that was inserted from ACA and is in valid state
- User tries to pay a single payment that was inserted from ACA and is in invalid state