Fixed some errors in reinforcement_policy_trainer.py
Fixed some errors in reinforcement_policy_trainer.py

wrongu/RocAlphaGo,MaMiFreak/RocAlphaGo,Rochester-NRT/AlphaGo,vftens/RocAlphaGo,hiropppe/RocAlphaGo,Rochester-NRT/AlphaGo,Rochester-NRT/AlphaGo,Rochester-NRT/RocAlphaGo