Merge branch 'harish-and-cindy-ldap-sync-rake-tasks' into 'master'

LDAP rake task to run a GroupSync

Closes #13089

See merge request gitlab-org/gitlab-ee!14735

ee/changelogs/unreleased/harish-and-cindy-ldap-sync-rake-tasks.yml

+---
+title: Add a rake task to run a LDAP group sync
+merge_request: 14735
+author: Harish Ramachandran and Cindy Pallares
+type: added

ee/lib/tasks/gitlab/ldap.rake

+namespace :gitlab do
+  namespace :ldap do
+    desc 'GitLab | LDAP | Run a GroupSync'
+    task group_sync: :gitlab_environment do
+      unless Gitlab::Auth::LDAP::Config.group_sync_enabled?
+        $stdout.puts 'LDAP GroupSync is not enabled.'
+        exit 1
+      end
+
+      $stdout.puts 'LDAP GroupSync is enabled.'
+      $stdout.puts 'Starting GroupSync...'
+
+      EE::Gitlab::Auth::LDAP::Sync::Groups.execute
+      $stdout.puts 'Finished GroupSync.'
+    end
+  end
+end