fix: set correct permission for the test directory.

[Honglichenn]

What was the problem/requirement? (What/Why)

test_shutdown test can pass without the delete permission of the file, which is affected by the parent folder's permission.

Note: This will only happen when the owner of the file and its parent directory is the same. If UserA creates a folder named FolderA and has the 'Delete subfolders and files' permission on that folder, then UserA can delete any files or subfolders within FolderA, even if UserA doesn't have explicit delete permissions on those individual files or subfolders, as long as UserA is the owner of those files or subfolders.

However, if UserA creates a folder named FolderA and has the 'Delete subfolders and files' permission on that folder, UserA cannot delete any files or subfolders within FolderA if those files or subfolders are owned by another user, such as UserB, even if UserA has the 'Delete subfolders and files' permission on the parent folder FolderA.

What was the solution? (How)

Remove the "Delete subfolders and files" of the parent folder of the connection file.

What is the impact of this change?

It will fail the test if the delete permission is missing.

How was this change tested?

I manually remove the delete permission of the connection file and the test will fail right now.

Was this change documented?

N/A

Is this a breaking change?

N/A

---

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[jericht]

Thanks for digging into this and making our tests more robust. LGTM!