[FIX] l10n_ro_edi: CIUS-RO DocumentTypeCode rule

In one of the schematron rules for CIUS-RO, there is a rule for
DocumentTypeCode element in the XML that failed the validity test.

`
<rule context="cac:AdditionalDocumentReference">
  <assert id="UBL-SR-43" flag="fatal" test="((cbc:DocumentTypeCode='130') or
  ((local-name(/*) = 'CreditNote') and (cbc:DocumentTypeCode='50')) or
  (not(cbc:ID/@scheme) and not(cbc:DocumentTypeCode)))">
    [UBL-SR-43]-Scheme identifier shall only be used for invoiced object
    (document type code with value 130)
  </assert>
</rule>
`

This commit fixes the current behavior by applying this behavior:
- DocumentTypeCode won't show up when exporting Invoice XML
- DocumentTypeCode will show up with the value '50' when exporting
  CreditNote XML

closes odoo/odoo#150613

Task-id: 3649426
Signed-off-by: Brice Bartoletti (bib) <bib@odoo.com>

addons/l10n_ro_edi/models/account_edi_xml_ubl_ciusro.py

@@ -74,9 +74,9 @@ class AccountEdiXmlUBLRO(models.AbstractModel):
 
     def _get_document_type_code_vals(self, invoice, invoice_data):
         # EXTENDS 'account_edi_ubl_cii
-        # http://www.datypic.com/sc/ubl20/e-cbc_DocumentTypeCode.html
         vals = super()._get_document_type_code_vals(invoice, invoice_data)
-        vals['value'] = "380" if invoice.move_type == 'out_invoice' else "381"
+        # [UBL-SR-43] DocumentTypeCode should only show up on a CreditNote XML with the value '50'
+        vals['value'] = '50' if invoice.move_type == 'out_refund' else False
         return vals
 
     def _export_invoice_constraints(self, invoice, vals):

addons/l10n_ro_edi/tests/test_files/from_odoo/ciusro_out_invoice.xml

@@ -15,7 +15,6 @@
   </cac:OrderReference>
   <cac:AdditionalDocumentReference>
     <cbc:ID>INV_2017_00001.pdf</cbc:ID>
-    <cbc:DocumentTypeCode>380</cbc:DocumentTypeCode>
     <cac:Attachment>
       <cbc:EmbeddedDocumentBinaryObject mimeCode="application/pdf" filename="INV_2017_00001.pdf">___ignore___</cbc:EmbeddedDocumentBinaryObject>
     </cac:Attachment>

addons/l10n_ro_edi/tests/test_files/from_odoo/ciusro_out_invoice_different_currency.xml

@@ -15,7 +15,6 @@
   </cac:OrderReference>
   <cac:AdditionalDocumentReference>
     <cbc:ID>INV_2017_00001.pdf</cbc:ID>
-    <cbc:DocumentTypeCode>380</cbc:DocumentTypeCode>
     <cac:Attachment>
       <cbc:EmbeddedDocumentBinaryObject mimeCode="application/pdf" filename="INV_2017_00001.pdf">___ignore___</cbc:EmbeddedDocumentBinaryObject>
     </cac:Attachment>

addons/l10n_ro_edi/tests/test_files/from_odoo/ciusro_out_refund.xml

@@ -14,7 +14,7 @@
   </cac:OrderReference>
   <cac:AdditionalDocumentReference xmlns="urn:oasis:names:specification:ubl:schema:xsd:Invoice-2">
     <cbc:ID>RINV_2017_00001.pdf</cbc:ID>
-    <cbc:DocumentTypeCode>381</cbc:DocumentTypeCode>
+    <cbc:DocumentTypeCode>50</cbc:DocumentTypeCode>
     <cac:Attachment>
       <cbc:EmbeddedDocumentBinaryObject mimeCode="application/pdf" filename="RINV_2017_00001.pdf">___ignore___</cbc:EmbeddedDocumentBinaryObject>
     </cac:Attachment>