459 make unit tests deterministic

[biosafetylvl5]

Reviewer Checklist

PR author: Please ensure you meet all of the below requirements, and check boxes appropriately.

Reviewers: Please confirm all required testing/documentation has been completed prior to approving.

Remove lines that are not applicable, explain if you select "NO REQUIRED"

• Required existing tests pass (ie full_test.sh, others as appropriate)
• NO REQUIRED existing tests (explain why not required)
• Required unit tests added and pass for new/modified functionality
• NO REQUIRED unit tests (explain why not required)
• Required integration tests added and pass for new/modified functionality
• NO REQUIRED integration tests (explain why not required)
• Required documentation added for new/modified functionality
• NO REQUIRED documentation (explain why not required)
• Required release notes added for new/modified functionality
• NO REQUIRED release notes (explain why not required)
• Required updates to other repos complete
• NO REQUIRED updates to other repos (explain why not required)

https://github.com/NRLMMD-GEOIPS/.github/blob/main/.github/review-template.md

Related Issues

fixes NRLMMD-GEOIPS/geoips#NNN

Testing Instructions

Summary

Output