huobipro: decode addl error code
seems reasonable to handle `order-limitorder-price-max-error` as well as `order-limitorder-price-min-error` :-)
(these is generated by huobipro when one tries to trade more than 10% away from current price)
I saw:
```
ExchangeError('huobipro {"status":"error","err-code":"order-limitorder-price-max-error","err-msg":"limit order price error, max: `0.00006719`","data":null}',)
```
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