Add Burndown chart on group milestone page in Starter

doc/user/project/milestones/burndown_charts.md

@@ -3,6 +3,7 @@
 >**Notes:**
 - [Introduced][ee-1540] in [GitLab Starter 9.1][ee-9.1] for project milestones.
 - [Introduced][ee-5354] in [GitLab Premium 10.8][ee-10.8] for group milestones.
+- [Added][ee-6495] to [GitLab Starter 11.2][ee-11.2] for group milestones. 
 - Closed or reopened issues prior to GitLab 9.1 won't have a `closed_at`
   value, so the burndown chart considers them as closed on the milestone
   `start_date`. In that case, a warning will be displayed.

ee/app/models/license.rb

@@ -13,6 +13,7 @@ class License < ActiveRecord::Base
     elastic_search
     export_issues
     external_files_in_gitlab_ci
+    group_burndown_charts
     group_webhooks
     issuable_default_templates
     issue_board_focus_mode
@@ -59,7 +60,6 @@ class License < ActiveRecord::Base
     commit_committer_check
     external_authorization_service
     ci_cd_projects
-    group_burndown_charts
     system_header_footer
   ].freeze
 

ee/changelogs/unreleased-ee/cr-add-group-burndown-chart.yml

+---
+title: Adds a burndown chart on the group milestone page in Starter.
+merge_request: 6495
+author:
+type: fixed