Payment Initiation status update

Following an update to the Payment status update, Payment status Pending will now be the first status returned on most payment initiation requests, instead of AcceptedSettlementInProcess.

Status AcceptedSettlementInProcess is still expected to be returned shortly after, once all internal checks have been completed. Final payment initiation status will still be AcceptedSettlementCompleted.

This change has no impact on overall payment processing times.