[RANGER-2663] Add elasticsearch-plugin infomation to README.txt

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 2.1.0
• Component/s: documentation
• Labels: doc
• Assignee: Qiang Zhang
• Reporter: Qiang Zhang
• Created: 05/Dec/19 11:46
• Updated: 09/Dec/19 05:20
• Resolved: 09/Dec/19 05:20

Description

As elasticsearch plugin has been submitted and merged into to Ranger,
we should add elasticsearch-plugin infomation to README.txt.
Related Issue: RANGER-2170

Issue Links

• links to: Review Requet