fix: [stix2 import] Avoiding issues with network_traffic.[src,dst]_type being converted as a hostname attribute

- While this may sound weird, it is not a logical
  feature we're fixing here but a fallback case,
  in other words "it is not an IP address, so the
  other option is: probably hostname"

Author: chrisr3d

misp_stix_converter/stix2misp/converters/stix2_indicator_converter.py

@@ -778,6 +778,8 @@ def _parse_network_traffic_attribute(
             values: Union[str, tuple], indicator_id: str, name: str):
         field = keys[0]
         if any(field == f'{feature}_ref' for feature in ('src', 'dst')):
+            if keys [-1] == 'type':
+                return
             if isinstance(values, tuple):
                 for value in values:
                     misp_object.add_attribute(