PAY - EFT - Mapping payments to BCROS accounts

[JohnamLane]

EFT payments will arrive with a short name identifying the client. This won't be the BCROS account name or number though.
A screen and/or process will be needed to map the first payment from each client to the correct BCROS account.

Larger clients will have a single short name, and they will want to pay multiple accounts using this short name.
This means that a single short name can be linked to multiple accounts.
Also, they intend to send us a single EFT for multiple statements.
From BC Hydro Feb 12th

Proposal:

• Short names that are mapped to more than 1 account will not have their payments applied automatically.
• Manual steps will be needed to map a portion of the EFT to the appropriate accounts.
• Staff to review the email that accompanies an EFT that is paying for multiple statements.
• Screen to allow a single short name to be 'associated' to multiple accounts.
• In cases where short name is mapped to more than one account, prompt staff via UI to specify which account is getting which amount.

Feb 27 - estimated 3-4 sprints to be stable in production for this epic specifically.