Add check to allow records with no taxa to fall through thesaurus check

[MuchQuak]

Summary

Enforcement of taxa thesaurus was too strict and didn't allow records without scinames to come up in the map search despite having valid latitude and longitude values

Development Pull Request

Pull Request Checklist:

Pre-Approval

• There is a description section in the pull request that details what the proposed changes do. It can be very brief if need be, but it ought to exist.
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• Symbiota coding standards have been followed
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• Comment which GitHub issue(s), if any does this PR address
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Post-Approval

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Thanks for contributing and keeping it clean!

[egbot]

Good catch