[backend] Fix on 500 errors when importing a scenario (#2144)

[Dimfacion]

Proposed changes

• Fix on 500 errors when importing a scenario

Related issues

• Closes Fix Internal Server Error on import of scenario #2144

Checklist

• I consider the submitted work as finished
• I tested the code for its functionality
• I wrote test cases for the relevant uses case
• I added/update the relevant documentation (either on github or on notion)
• Where necessary I refactored code to improve the overall quality
• For bug fix -> I implemented a test that covers the bug

Further comments

If this is a relatively large or complex change, kick off the discussion by explaining why you chose the solution you did and what alternatives you considered, etc...

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 35.10%. Comparing base (05f9984) to head (4a25257).
Report is 3 commits behind head on master.

Files with missing lines	Patch %	Lines
...main/java/io/openbas/importer/V1_DataImporter.java	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #2146      +/-   ##
============================================
- Coverage     35.31%   35.10%   -0.21%     
+ Complexity     1429     1418      -11     
============================================
  Files           536      536              
  Lines         16195    16195              
  Branches       1036     1036              
============================================
- Hits           5719     5686      -33     
- Misses        10175    10215      +40     
+ Partials        301      294       -7     

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