Manage invoice line creation the same way as stock move

As the invoice and shipment are both managed in the process method. So it sum
all the quantity invoiced (even the canceled) with the exception of the one
already recreated.

review350001
(transplanted from 06a567499842fe1401458ca36b1e62a7d9e796aa)

purchase.py

@@ -1251,17 +1251,12 @@ class PurchaseLine(ModelSQL, ModelView):
                     quantity += uom_obj.compute_qty(move.uom, move.quantity,
                             line.unit)
 
-        if line.purchase.invoices_ignored:
-            ignored_ids = set(
-                l.id for i in line.purchase.invoices_ignored for l in i.lines)
-        else:
-            ignored_ids = ()
+        skip_ids = set(l.id for i in line.purchase.invoices_recreated
+            for l in i.lines)
         for invoice_line in line.invoice_lines:
             if invoice_line.type != 'line':
                 continue
-            if ((invoice_line.invoice and
-                    invoice_line.invoice.state != 'cancel') or
-                invoice_line.id in ignored_ids):
+            if invoice_line.id not in skip_ids:
                 quantity -= uom_obj.compute_qty(invoice_line.unit,
                         invoice_line.quantity, line.unit)
         res['quantity'] = quantity