Fix: train_summary.csv not generated

[Busy2045]

Hello,

I was not getting error in train phase however train_summary.csv not generated either. However, when i backtest i was getting error "train_summary.csv not found".

I found the solution. The problem is related to indentation in tradertrainer.py(__log_result_csv method). At the end of the method
replace the lines with indented ones as attached.

That will produce the necessary csv file.