python3: futurize stage2

common/python/nomadcore/baseclasses.py

common/python/nomadcore/caching_backend.py

common/python/nomadcore/compact_sha.py

common/python/nomadcore/coordinate_reader.py

common/python/nomadcore/json_support.py

common/python/nomadcore/local_backend.py

common/python/nomadcore/local_meta_info.py

common/python/nomadcore/match_highlighter.py

common/python/nomadcore/model_archive.py

common/python/nomadcore/model_meta_info.py

common/python/nomadcore/parse_streamed_dicts.py

common/python/nomadcore/parser_backend.py

common/python/nomadcore/simple_parser.py

common/python/nomadcore/unit_conversion/unit_conversion.py

common/python/nomadcore/utils.py

common/python/nomadscripts/calculate_meta_info_overrides.py

common/python/nomadscripts/normalize_meta_info.py

requirements.txt