Add "MPESA" as a payment option

[CeciliaHinga]

From tenfour-archive created by kamaulynder: ushahidi/tenfour-archive#989

User story
As a Kenyan user I want to be able to pay for TenFour using MPESA because I don't have a credit card

Questions

• What changes do we need to make to our payments endpoints to accept services other than Chargebee
• Do we need a new payments gateway to accept payments
• Do we need to create a unique payment method just for Kenya or should we be thinking about this for other markets too?

Research
https://blogscheme.com/mpesa-wordpress-payment-gateways/

[CeciliaHinga]

Mpesa Integration API -> https://developer.safaricom.co.ke/docs#creating-a-http-server-listener

1. We need to get a "Pay Bill" number from Safaricom - this is the business number that people use to pay when they go to their "Lipa na Mpesa" option on Mpesa. It's the number associated with Ushahidi. We will then link this to our bank accounts once money reaches a certain float it moves to bank.
2. We will need to generate unique IDs e.g "orgname" to use as the account number for which the clients will use when making the payment
3. Option 3 - use an existing payments aggregator that covers other markets e.g -> http://developer.pesapal.com/how-to-integrate/step-by-step

@caharding dumped some more info, just thinking we need to think about this as we work on the payments screens

[CeciliaHinga]

An example from Africa's Talking

[CeciliaHinga]

@kamaulynder is this ready to move to "Ready"?