fix sonar findings

[jkroepke]

What this PR does / why we need it:

Which issue this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close that issue when PR gets merged): fixes #

Special notes for your reviewer:

PR Readiness Checklist:

Complete these before marking the PR as ready to review:

• the CHANGELOG.md release notes have been updated to reflect any significant (and particularly user-facing) changes introduced by this PR

[codecov]

Codecov Report

Merging #699 (1446b9f) into main (eae37db) will decrease coverage by 0.02%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##               main     #699      +/-   ##
============================================
- Coverage     96.38%   96.36%   -0.03%     
+ Complexity     1288     1287       -1     
============================================
  Files            74       74              
  Lines          4121     4122       +1     
  Branches        454      454              
============================================
  Hits           3972     3972              
  Misses           64       64              
- Partials         85       86       +1     

Impacted Files	Coverage Δ
...rvice/clientauthorization/PermissionTypeAndId.java	80.64% <ø> (ø)
...sys/keycloak/config/service/UserImportService.java	100.00% <100.00%> (ø)
...s/keycloak/config/service/ClientImportService.java	96.87% <0.00%> (-0.63%)	⬇️

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