Bug Fix

[lincmba]

Handle null adminlevels in post filtering location hierarchy

IMPORTANT: Where possible all PRs must be linked to a Github issue

Resolves [link to issue]

Engineer Checklist

• I have written Unit tests for any new feature(s) and edge cases for
  bug fixes
• I have added documentation for any new feature(s) and configuration
  option(s) on the README.md
• I have run mvn spotless:check to check my code follows the project's
  style guide
• I have run mvn clean test jacoco:report to confirm the coverage report
  was generated at plugins/target/site/jacoco/index.html
• I ran mvn clean package right before creating this pull request.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 45.28%. Comparing base (712d495) to head (c78b77a).
Report is 12 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main      #77      +/-   ##
============================================
+ Coverage     45.01%   45.28%   +0.27%     
- Complexity      130      134       +4     
============================================
  Files            16       16              
  Lines          1213     1252      +39     
  Branches        146      151       +5     
============================================
+ Hits            546      567      +21     
- Misses          600      618      +18     
  Partials         67       67              

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