update OCB decoding

[semuadmin]

pyspartn Pull Request Template

RELEASE CANDIDATE 0.2.0-alpha

1. OCB payload definitions and decoding updated.
2. pyspartn can now successfully decode all GAD and HPAC payloads and the majority of OCB payloads (though further testing is required to validate decoded payload content), but some small OCB payloads (nData < 35 bytes) cannot yet be successfully decoded. For the time being, a temporary override has been implemented in spartnmessage.py to suppress the decode flag for those payload types that cannot yet be successfully decoded. This will be removed once testing is completed.

Fixes Failed OCB payload decodes

Testing

Please test all changes, however trivial, against the supplied pytest suite tests/test_*.py. Please describe any test cases you have amended or added to this suite to maintain >= 99% code coverage.

• [x] Added OCB-GPS stream test

Checklist:

• [x] I agree to abide by the code of conduct (see CODE_OF_CONDUCT.md).
• [x] My code follows the style guidelines of this project (see CONTRIBUTING.MD).
• [x] I have performed a self-review of my own code.
• [x] (if appropriate) I have cited my SPARTN documentation source(s).
• [x] I have commented my code, particularly in hard-to-understand areas.
• [x] I have made corresponding changes to the documentation.
• [x] (if appropriate) I have added test cases to the tests/test_*.py pytest suite to maintain >= 99% code coverage.
• [x] I have tested my code against the full tests/test_*.py unittest suite.
• [x] My changes generate no new warnings.
• [x] Any dependent changes have been merged and published in downstream modules.
• [x] I have signed my commits.
• [x] I understand and acknowledge that the code will be published under a BSD 3-Clause license.