Fix parse_trade in bitrue.py
Fix parse_trade in bitrue.py

Note: when running yarn transpile, the generated file differs completely
and it should be fixed properly (probably in bitrue.js). For now I fixed
the parse_trade method that was not working in python, not it works.

ccxt/ccxt,ccxt/ccxt,ccxt/ccxt,ccxt/ccxt,ccxt/ccxt