Add AddLowerPathIndexToRoutes to setup_postgresql.rake

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

lib/tasks/migrate/setup_postgresql.rake

+require Rails.root.join('lib/gitlab/database')
+require Rails.root.join('lib/gitlab/database/migration_helpers')
 require Rails.root.join('db/migrate/20151007120511_namespaces_projects_path_lower_indexes')
 require Rails.root.join('db/migrate/20151008110232_add_users_lower_username_email_indexes')
+require Rails.root.join('db/migrate/20161212142807_add_lower_path_index_to_routes')
 
 desc 'GitLab | Sets up PostgreSQL'
 task setup_postgresql: :environment do
   NamespacesProjectsPathLowerIndexes.new.up
   AddUsersLowerUsernameEmailIndexes.new.up
+  AddLowerPathIndexToRoutes.new.up
 end