bugfix(#1115): multifile-input does not show files ins subfolders

[lmoesle]

Description

• Prozessanpassung für den Bugfix in der Formserver Integration
• multifile-input does not show files ins subfolders
• Bugfix im Connector (damit der Connector wieder startet)

Reference

Issues: closes #1115

Check-List

• All Acceptance criteria of user story are met
• JUnit tests are written (60% CodeCov)
• Internal Review is maintained
• Documentations external and internal are completed
• Smoketest successful (Manual E2E-Test depending on Change)
• No Branch waste left
• Board is up-to-date
• Openshift environments are prepared (Secrets, etc.) and release-issue is maintained

[codecov]

Codecov Report

Attention: 7 lines in your changes are missing coverage. Please review.

Comparison is base (d1d176f) 38.50% compared to head (fac1afb) 38.50%.
Report is 8 commits behind head on dev.

Files	Patch %	Lines
...en/oss/digiwf/shared/file/AbstractFileService.java	0.00%	7 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##                dev    #1171   +/-   ##
=========================================
  Coverage     38.50%   38.50%           
- Complexity     1306     1308    +2     
=========================================
  Files           598      598           
  Lines          8666     8671    +5     
  Branches        423      424    +1     
=========================================
+ Hits           3337     3339    +2     
- Misses         5191     5194    +3     
  Partials        138      138           

Flag	Coverage Δ
unittests	38.50% <46.15%> (+<0.01%)	⬆️

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