CMR-9867: Fixing ISO temporal to only read the date value

[eereiter]

Overview

What is the feature/fix?

Fixing ISO temporal to only read the date value

What is the Solution?

Fixing ISO temporal to only read the date value

What areas of the application does this impact?

umm-spec-lib/src/cmr/umm_spec/xml_to_umm_mappings/iso19115_2.clj find-single-date-time

Checklist

• [ x] I have updated/added unit and integration tests that prove my fix is effective or that my feature works
• [ x] New and existing unit and int tests pass locally and remotely with my changes
• [ x] I have removed unnecessary/dead code and imports in files I have changed
• [ x] I have performed a self-review of my own code
• [ x] I have commented my code, particularly in hard-to-understand areas
• [ x] I have made corresponding changes to the documentation
• [ x] My changes generate no new warnings

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 57.45%. Comparing base (5125da6) to head (37a57fd).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #2104 +/- ## ========================================== - Coverage 57.83% 57.45% -0.39% ========================================== Files 1041 1041 Lines 70223 70223 Branches 1979 1882 -97 ========================================== - Hits 40614 40347 -267 - Misses 27746 28058 +312 + Partials 1863 1818 -45 ```

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