Unittest test_checkin.py warns when cleaning up symlinks

[remkonoteboom]

Describe the bug
When the tests finish executing, errors are dumped out when trying to clean up symlinks. They are harmless, however output should be clean

To Reproduce

1. Run: python test_checkin.py

Expected behavior
Script runs without error if all tests pass

Screenshots

[Errno 2] No such file or directory: '../../../../tmp/tactic/alias2/alias2/text.txt' -> '/home/tactic/assets/alias2/text.txt'
Failed to undo symlink /home/tactic/assets/../alias2/alias2/text.txt
[Errno 2] No such file or directory: '../../../../tmp/tactic/alias2/alias2/text.txt' -> '/home/tactic/assets/alias2/text.txt'
Failed to undo symlink /home/tactic/assets/../alias2/alias2/text.txt
Error:  b"Destination path '/home/tactic/tactic_temp/cache/dd28d2cafb6e4fa32b6/filename_process_v001.jpg' already exists"
Error moving [/home/tactic/assets/unittest/person/PERSON00002/process/versions/subdir/filename_process_v001.jpg] to cache directory in [/home/tactic/tactic_temp/cache/dd28d2cafb6e4fa32b6] failed. Removed repository files
Error:  b"Destination path '/home/tactic/tactic_temp/cache/dd28d2cafb6e4fa32b6/filename_process_v001.jpg' already exists"
Error moving [/home/tactic/assets/unittest/person/PERSON00002/process/versions/filename_process_v001.jpg] to cache directory in [/home/tactic/tactic_temp/cache/dd28d2cafb6e4fa32b6] failed. Removed repository files
Error:  b"Destination path '/home/tactic/tactic_temp/cache/dd28d2cafb6e4fa32b6/TESTfilename_v001.jpg' already exists"
Error moving [/home/tactic/assets/unittest/person/PERSON00002/naming/TESTfilename_v001.jpg] to cache directory in [/home/tactic/tactic_temp/cache/dd28d2cafb6e4fa32b6] failed. Removed repository files