harvest halts when it encounters a directory with mode 000

[rchenatjpl]

🐛 Describe the bug

harvest halts when it encounters a directory with mode 000

📜 To Reproduce

In a bundle with many collections, set half the directories to unreadable, then run harvest on it, e.g.
% /usr/local/build11/harvest-3.6.0/bin/harvest -c killme.xml
[SUMMARY] Reading configuration from /data/home/pds4/test/killme.xml
[SUMMARY] Output directory: /tmp/harvest/out
[SUMMARY] Elasticsearch URL: https://search-en-prod-di7dor7quy7qwv3husi2wt5tde.us-west-2.es.amazonaws.com:443, index: registry
[INFO] Connecting to Elasticsearch
[INFO] Loading PDS to ES data type mapping from /usr/local/build11/harvest-3.6.0/elastic/data-dic-types.cfg
[INFO] Processing directory: /data/pds4/1700/killme
[INFO] Processing /data/pds4/1700/killme/resource/resource.maven_archive_information_1.0.xml
[INFO] Processing /data/pds4/1700/killme/resource/resource.phoenix_archive_information_1.0.xml
[INFO] Processing /data/pds4/1700/killme/resource/resource.ladee_archive_information_1.0.xml
[INFO] Processing /data/pds4/1700/killme/resource/Collection_resource_v1.0.xml
[INFO] Wrote 1 collection inventory document(s)
[INFO] Processing /data/pds4/1700/killme/resource/resource.phoenix_archive_information_1.1.xml
[INFO] Processing /data/pds4/1700/killme/miscellaneous/collection_miscellaneous.xml
[INFO] Wrote 1 collection inventory document(s)
[INFO] Processing /data/pds4/1700/killme/miscellaneous/lids_deprecated.xml
[INFO] Wrote 7 product(s)
[ERROR] /data/pds4/1700/killme/investigation

🕵️ Expected behavior

I would like harvest to skip such directories and not quit

📚 Version of Software Used

Harvest version: 3.6.0
Build time: 2022-04-13T17:42:54Z

🩺 Test Data / Additional context

🏞Screenshots

🖥 System Info

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

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🦄 Related requirements

⚙️ Engineering Details