removeTree() thinks it fails with ENOTEMPTY, but works on second try

[gausie]

As said in the title, I get an Exception ENOTEMPTY when I run removeTree() on a directory for the first time, but if I run it again it works without issue.

[kriskowal]

Patches welcome. Thank you for isolating.

[djabraham]

I noticed this within a test module, when attempting to immediately delete a folder after creation, or very shortly thereafter. Perhaps a lock is pending removal, or perhaps the list of items being recursively removed did not include a recently added item.

By simply adding a timeout, the problem was resolved (for us at least).