admin import fails if keyword list contains a None

[pvgenuchten]

Found this in my logs, when importing some iso records

  File "/harvesters/record-to-pycsw/metadata.py", line 126, in <module>
    record = metadata.parse_record(context, metadata_record, repo)
  File "/harvesters/lib/python3.10/site-packages/pycsw/core/metadata.py", line 119, in parse_record
    return _parse_metadata(context, repos, record)
  File "/harvesters/lib/python3.10/site-packages/pycsw/core/metadata.py", line 149, in _parse_metadata
    return [_parse_iso(context, repos, exml)]
  File "/harvesters/lib/python3.10/site-packages/pycsw/core/metadata.py", line 1429, in _parse_iso
    _set(context, recobj, 'pycsw:Keywords', ','.join([k.name for k in all_keywords]))
TypeError: sequence item 0: expected str instance, NoneType found
Could not parse 33208a53-4973-4516-8f16-5ef82e20fd3b as record, sequence item 0: expected str instance, NoneType found, None

similar for bands

  File "/harvesters/record-to-pycsw/metadata.py", line 126, in <module>
    record = metadata.parse_record(context, metadata_record, repo)
  File "/harvesters/lib/python3.10/site-packages/pycsw/core/metadata.py", line 119, in parse_record
    return _parse_metadata(context, repos, record)
  File "/harvesters/lib/python3.10/site-packages/pycsw/core/metadata.py", line 149, in _parse_metadata
    return [_parse_iso(context, repos, exml)]
  File "/harvesters/lib/python3.10/site-packages/pycsw/core/metadata.py", line 1528, in _parse_iso
    for band in ci.bands:
AttributeError: 'MD_FeatureCatalogueDescription' object has no attribute 'bands'
Could not parse 2e0566eb-af7c-493c-abec-81f990c96161 as record, 'MD_FeatureCatalogueDescription' object has no attribute 'bands', None

records.zip