autotest/autotest — pull request #759 by liyangfnst (2013-10-30 07:03:05+00:00)
Title: autotest: Execute shutil.rmtree() twice if autotest dir based on NFS

.nfs* files get created when you rm a file on an NFS mount
that is still in use by something, need rmtree twice.

Signed-off-by: Li Yang