Automatic payments should be created according to the order's payment term

[Guewen Baconnier @ Camptocamp]

When automatic payments are created for an imported sale orders, they should be created accordingly to the sale order's payment terms.

Actual:
An order imported with a payment term "Payment 3x" for an amount of 99€ creates one payment of 99€.

Expected:
An order imported with a payment term "Payment 3x" for an amount of 99€ should use the compute method of account.payment.term to get the date and amounts of the deadlines create 3 payments. So the payment move lines will have the same amounts as the invoice ones.

[Guewen Baconnier @ Camptocamp (gbaconnier-c2c)]

Fix proposed here:
https://code.launchpad.net/~magentoerpconnect-community/magentoerpconnect/legacy61-fix-1011491/+merge/109634