Hadoop: Added some checks for not-a-file paths; changed what delete returns on not-a-file.
Hadoop: Added some checks for not-a-file paths;
changed what delete returns on not-a-file.

ajnelson/ceph,ajnelson/ceph,ajnelson/ceph,ajnelson/ceph,ajnelson/ceph,ajnelson/ceph