[HDFS-11978] Remove invalid '-usage' command of 'ec' and add missing commands 'addPolicies' 'listCodecs' in doc

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 3.0.0-alpha4
• Fix Version/s: 3.0.0-alpha4
• Component/s: documentation
• Hadoop Flags: Reviewed
• Assignee: Wenxin He
• Reporter: Wenxin He
• Created: 15/Jun/17 07:16
• Updated: 02/Oct/19 17:15
• Resolved: 20/Jun/17 16:36

Description

Remove invalid '-usage' command of 'ec' in HDFSErasureCoding.md.
Add missing commands 'addPolicies' 'listCodecs' in HDFSCommands.md.

Issue Links

• links to: GitHub Pull Request #237