No update name during parsing <NtryDtls>

If the field "name" of the module "account.bank.statement.line" is already  assigned during the parse of the element NtryDtls of the camt053 file, we don't update it to avoid to lose data.

account_bank_statement_import_camt_oca/models/parser.py

@@ -54,12 +54,13 @@ class CamtParser(models.AbstractModel):
     def parse_transaction_details(self, ns, node, transaction):
         """Parse TxDtls node."""
         # message
-        self.add_value_from_node(
-            ns, node, [
-                './ns:RmtInf/ns:Ustrd|./ns:RtrInf/ns:AddtlInf',
-                './ns:AddtlNtryInf',
-                './ns:Refs/ns:InstrId',
-            ], transaction, 'name', join_str='\n')
+        if transaction['name'] == '/':
+            self.add_value_from_node(
+                ns, node, [
+                    './ns:RmtInf/ns:Ustrd|./ns:RtrInf/ns:AddtlInf',
+                    './ns:AddtlNtryInf',
+                    './ns:Refs/ns:InstrId',
+                ], transaction, 'name', join_str='\n')
         # name
         self.add_value_from_node(
             ns, node, [