Ensure a Geo migration is the same in CE and EE

In CE this migration includes an additional module, but this was left
out in the EE version.

db/migrate/20190612111201_add_geo_container_repository_counters.rb

 # frozen_string_literal: true
 
 class AddGeoContainerRepositoryCounters < ActiveRecord::Migration[5.1]
+  include Gitlab::Database::MigrationHelpers
+
   DOWNTIME = false
 
   def change