[#2234] Fix subject for questions without e-suite code mapping

[pi-sigma]

Taiga: #2234

[alextreme]

Don't forget to add a regressiontest for this

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.00%. Comparing base (9253437) to head (370edcf).
Report is 4 commits behind head on develop.

❗ Current head 370edcf differs from pull request most recent head e7d0338. Consider uploading reports for the commit e7d0338 to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1100      +/-   ##
===========================================
- Coverage    95.00%   95.00%   -0.01%     
===========================================
  Files          911      911              
  Lines        32034    32044      +10     
===========================================
+ Hits         30435    30444       +9     
- Misses        1599     1600       +1     

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[alextreme]

Approving to allow Paul to check this with the eSuite on the testenvironment