Add root account id to master_courses_master_templates
user
```ruby
#
# Copyright (C) 2020 - present Instructure, Inc.
#
# This file is part of Canvas.
#
# Canvas is free software: you can redistribute it and/or modify
# the terms of the GNU Affero General Public License as publishe
# Software Foundation, version 3 of the License.
#
# Canvas is distributed in the hope that it will be useful, but 
# WARRANTY; without even the implied warranty of MERCHANTABILITY
# A PARTICULAR PURPOSE. See the GNU Affero General Public Licens
# details.
#
# You should have received a copy of the GNU Affero General Publ
# with this program. If not, see <http://www.gnu.org/licenses/>.

class AddRootAccountIdToMasterCoursesMasterTemplates < ActiveRecord::Migration[5.2]
  include MigrationHelpers::AddColumnAndFk

  tag :predeploy
  disable_ddl_transaction!

  def up
    add_column_and_fk :master_courses_master_templates, :root_account_id, :accounts
    add_index :master_courses_master_templates, :root_account_id, algorithm: :concurrently
  end

  def down
    remove_column :master_courses_master_templates, :root_account_id
  end
end
```
assistant