Add hostname to usage ping

changelogs/unreleased/disable-usage-ping-2.yml

+---
+title: Add hostname to usage ping
+merge_request:
+author:

lib/gitlab/usage_data.rb

@@ -52,6 +52,7 @@ module Gitlab
       def license_usage_data
         usage_data = {
           uuid: current_application_settings.uuid,
+          hostname: Gitlab.config.gitlab.host,
           version: Gitlab::VERSION,
           active_user_count: User.active.count,
           recorded_at: Time.now,

spec/lib/gitlab/usage_data_spec.rb

@@ -17,6 +17,7 @@ describe Gitlab::UsageData do
         edition
         version
         uuid
+        hostname
       ))
     end