Use recursive listStatus to implement du

Description

Currently, du makes many RPC calls to the master, one per level of the directory.
For this JIRA, we can improve on this by using recursive flag for listStatus calls and use recursive listStatus in du commands.

Environment

None

Status

Assignee

David Zhu

Reporter

David Zhu

Labels

None

Components

Affects versions

1.7.1

Priority

Major
Configure