[FIX] Aging Buckets

In certain scenarios involving mutliple payments for multiple
invoices, where the reconciliation happens together and the debit
move is the smaller item the aging duplicates its value, making
the balance greater than it should be.

This fix works by preventing moves where different lines are both partial
reconciled being grouped together by adding the lines id
to the group by clause of _show_buckets_sql_q1

customer_activity_statement/report/customer_activity_statement.py

@@ -190,7 +190,7 @@ class CustomerActivityStatement(models.AbstractModel):
                                 ) AND l.date <= '%s' AND not l.blocked
             GROUP BY l.partner_id, l.currency_id, l.date, l.date_maturity,
                                 l.amount_currency, l.balance, l.move_id,
-                                l.company_id
+                                l.company_id, l.id
         """ % (self._get_reconcile_date(), date_end,
                self._get_reconcile_date(), date_end, partners,
                date_end, date_end, date_end)

customer_outstanding_statement/report/customer_outstanding_statement.py

@@ -186,7 +186,7 @@ class CustomerOutstandingStatement(models.AbstractModel):
                                 ) AND l.date <= '%s' AND not l.blocked
             GROUP BY l.partner_id, l.currency_id, l.date, l.date_maturity,
                                 l.amount_currency, l.balance, l.move_id,
-                                l.company_id
+                                l.company_id, l.id
         """ % (self._get_reconcile_date(), date_end,
                self._get_reconcile_date(), date_end, partners,
                date_end, date_end, date_end)