#5429 Fix/huobi update event bug

This PR addresses a bug in Huobi where, on update event of an untracked order, the code will try to reference variables that are not yet defined.

The problem here is that there is a circumstance in which the order is no longer tracked due to a status update, but the trade update arrives later and this makes the strategy fail. Also, if the user places an order manually while the bot is running, the strategy will also fail.

Link: https://github.com/hummingbot/hummingbot/pull/5429