got rid of duplicated file/directory existence implementations / improved errorhandling and testing of FileLister
#11763
| Job | Run time |
|---|---|
| 3m 5s | |
| 2m 8s | |
| 2m 14s | |
| 3m 45s | |
| 2m 39s | |
| 3m 42s | |
| 7m 6s | |
| 9m 8s | |
| 8m 51s | |
| 10m 4s | |
| 52m 42s |