Ensure ImportExport maintains trigger ownership

lib/gitlab/import_export/relation_factory.rb

@@ -28,7 +28,7 @@ module Gitlab
                     links: 'Releases::Link',
                     metrics_setting: 'ProjectMetricsSetting' }.freeze
 
-      USER_REFERENCES = %w[author_id assignee_id updated_by_id merged_by_id latest_closed_by_id user_id created_by_id last_edited_by_id merge_user_id resolved_by_id closed_by_id].freeze
+      USER_REFERENCES = %w[author_id assignee_id updated_by_id merged_by_id latest_closed_by_id user_id created_by_id last_edited_by_id merge_user_id resolved_by_id closed_by_id owner_id].freeze
 
       PROJECT_REFERENCES = %w[project_id source_project_id target_project_id].freeze
 

spec/lib/gitlab/import_export/project.json

@@ -6630,6 +6630,7 @@
       "id": 123,
       "token": "cdbfasdf44a5958c83654733449e585",
       "project_id": 5,
+      "owner_id": 1,
       "created_at": "2017-01-16T15:25:28.637Z",
       "updated_at": "2017-01-16T15:25:28.637Z"
     }