[FIX] delivery_dhl_parcel: show full name

If we just show the partner's name there will be cases where we'll be
losing the most important info which is the main organization where the
shipping is sent.

TT49966

delivery_dhl_parcel/models/delivery_carrier.py

@@ -73,8 +73,20 @@ def _prepare_dhl_parcel_address_info(self, partner):
         address = partner.street or ""
         if partner.street2:
             address += " " + partner.street2
+        partner_name = partner.name
+        # We have a limit of 40 chars, so we'll try to allocate as much space possible
+        # for both parent an contact name, trying to use all the available space if
+        # possible and otherwise, cutting it to 19 chars max (letting 2 chars for
+        # the separation of both names)
+        if partner.parent_id:
+            max_parent_length = min(
+                len(partner.parent_id.name), 19 + max(19 - len(partner_name), 0)
+            )
+            partner_name = (
+                f"{partner.parent_id.name[:max_parent_length]}, {partner_name}"
+            )
         return {
-            "Name": partner.name or partner.parent_id.name or "",
+            "Name": partner_name[:40],
             "Address": address[:40],
             "City": partner.city or "",
             "PostalCode": partner.zip or "",