refs 6566 次年度発注作成
refs 6046 patronのリレーション修正、発注番号修正
refs 6046 支払画面に検索追加
refs 6046 issue6046をマージ
Merge branch 'issue6046' of github.com:MiraitSystems/enju_trunk into issue6046

Conflicts:
	app/controllers/payments_controller.rb
	app/views/orders/index.html.erb
	app/views/payments/index.html.erb