Impacted versions:
10.0
Steps to reproduce:
1. Create Customer Invoice and Validate
2. Make Payments on Payments screen and confirm
3. Open Manual Payments and Invocies and try to reconcile hitting CTRL-Enter for mass reconciliation

Current behavior:
Odoo server error raised with traceback
File "/home/odoo/runbot/extra/runbot/static/build/188623-10-0-347494/odoo/addons/account/models/account_move.py", line 729, in process_reconciliations
    self.process_reconciliation(datum['mv_line_ids'], datum['new_mv_line_dicts'])
TypeError: process_reconciliation() takes exactly 2 arguments (3 given)

Expected behavior:

Video/Screenshot link (optional):
![image](https://cloud.githubusercontent.com/assets/17149532/21532189/3596954a-cd4e-11e6-94fa-be2195bd9f7b.png)


addons/account/models/account_move.py
'debit': amount_diff < 0 and -amount_diff or 0.0,
                'credit': amount_diff > 0 and amount_diff or 0.0,
                'account_id': rec.debit_move_id.account_id.id,
                'move_id': move.id,
                'currency_id': currency.id,
                'amount_currency': -diff_in_currency,
                'partner_id': rec.debit_move_id.partner_id.id,
            })
            rec.env['account.move.line'].create({
                'name': _('Currency exchange rate difference'),
                'debit': amount_diff > 0 and amount_diff or 0.0,
                'credit': amount_diff < 0 and -amount_diff or 0.0,
                'account_id': amount_diff > 0 and rec.company_id.currency_exchange_journal_id.default_debit_account_id.id or rec.company_id.currency_exchange_journal_id.default_credit_account_id.id,
                'move_id': move.id,
                'currency_id': currency.id,
                'amount_currency': diff_in_currency,
                'partner_id': rec.debit_move_id.partner_id.id,
            })
            for aml in aml_to_fix:
                partial_rec = rec.env['account.partial.reconcile'].create({
                    'debit_move_id': aml.credit and line_to_reconcile.id or aml.id,
                    'credit_move_id': aml.debit and line_to_reconcile.id or aml.id,
                    'amount': abs(aml.amount_residual),
                    'amount_currency': abs(aml.amount_residual_currency),
                    'currency_id': currency.id,
                })
            move.post()
        return line_to_reconcile, partial_rec
    @api.model
    def create(self, vals):