xapi-project/xen-api — pull request #1925 by phusl (2014-09-11 07:24:43+00:00)
Title: CA-145413: xenopsd internal error: Unix.Unix_error(27, "rmdir", "/var/run/nonpersistent/xenops/extra")

FileFS.rm has a race condition in deleting emtpy dir when there're 2 or more vms are rebooting.
So let's use try-catch to delete empty dir.

Signed-off-by: Phus Lu