[ENH] Make sure message is filled for camt.

Message was not taken from AddtlNtryInf element, if not part of details.

Not sure wether it actually can be part of details (NtryDtls element), but this change least intrusive.

account_bank_statement_import_camt/camt.py

@@ -134,6 +134,9 @@ class CamtParser(object):
             './ns:NtryDtls/ns:TxDtls', namespaces={'ns': ns})
         if details_node:
             self.parse_transaction_details(ns, details_node[0], transaction)
+        if not transaction.message:
+            self.add_value_from_node(
+                ns, node, './ns:AddtlNtryInf', transaction, 'message')
         transaction.data = etree.tostring(node)
         return transaction