Fix NPE in TestRunSession.toString()

[laeubi]

No description provided.

[github-actions]

Test Results

1 170 files   -   573  1 170 suites   - 573   1h 6m 57s ⏱️ - 23m 50s
4 170 tests ±    0  4 129 ✅  -    17   41 💤 +18  0 ❌  - 1 
8 738 runs   - 4 281  8 622 ✅  - 4 230  116 💤  - 50  0 ❌  - 1 

Results for commit 4e35483. ± Comparison against base commit 31bb835.

This pull request skips 18 tests.

AutomatedResourceTests AllRegressionTests Bug_026294 ‑ testDeleteClosedProjectLinux
AutomatedResourceTests AllRegressionTests Bug_026294 ‑ testDeleteFolderLinux
AutomatedResourceTests AllRegressionTests Bug_026294 ‑ testDeleteOpenProjectLinux
AutomatedResourceTests AllRegressionTests Bug_044106 ‑ testDeleteLinkedFile
AutomatedResourceTests AllRegressionTests Bug_044106 ‑ testDeleteLinkedFileKeepHistory
AutomatedResourceTests AllRegressionTests Bug_044106 ‑ testDeleteLinkedFolder
AutomatedResourceTests AllRegressionTests Bug_044106 ‑ testDeleteLinkedFolderKeepHistory
AutomatedResourceTests AllRegressionTests Bug_044106 ‑ testDeleteLinkedFolderParentKeepHistory
AutomatedResourceTests AllRegressionTests Bug_044106 ‑ testDeleteLinkedResourceInProject
AutomatedResourceTests AllRegressionTests Bug_044106 ‑ testDeleteLinkedResourceInProjectKeepHistory
…