add cent account

config/locales/models/cent_balance.yml

@@ -1,9 +1,9 @@
 zh-CN:
   activerecord:
     models:
-      cent_balances: 积分账户
+      cent_balance: 积分账户
     attributes:
-      cent_balances:
+      cent_balance:
         id: Id
         wx_user: 微信用户
         wx_uid: 微信ID