Fix for get-attr to deal with binary data to stdout tty
ceph_filestore_dump: Fail import/export with a tty for stdin/stdout

Signed-off-by: David Zafman <david.zafman@inktank.com>
ceph_filestore_dump: Add set-attr object command

Signed-off-by: David Zafman <david.zafman@inktank.com>
ceph_filestore_dump: Add rm-attr object command

Signed-off-by: David Zafman <david.zafman@inktank.com>
ceph_filestore_dump Add get-omap object command

Signed-off-by: David Zafman <david.zafman@inktank.com>
ceph_filestore_dump: Add set-omap object command

Signed-off-by: David Zafman <david.zafman@inktank.com>
ceph_filestore_dump: Add rm-omap object command

Signed-off-by: David Zafman <david.zafman@inktank.com>
Fix usage