Export public channel data into export.json file

Description

For Admins, add a link under Team Settings->Advanced called "Export all public channel data"

Clicking on this link should generate a datetime stamped file called: "20150628_0953_export.json" (for a file exported on 6/28/2015 at 9:53am GMT 0)

The JSON format for the file should be compatible with import functionality.

(Old ticket MM-1409)

QA Test Steps

None

Status

Mana

16

Assignee

George Goldberg

Reporter

Lindsay Brock

Epic Link

Fix versions

Mattermost Team

None

Sprint

None

Labels

None

GitHub Issue

None

QA Assignee

Lindy Isherwood