print optimizer state in debug log messages

freqtrade/optimize/hyperopt.py

@@ -288,6 +288,9 @@ class Hyperopt(Backtesting):
                             'total_tries': self.total_tries,
                             'result': f_val[j]['result'],
                         })
+                        logger.debug(f"Optimizer params: {f_val[j]['params']}")
+                    for j in range(cpus):
+                        logger.debug(f"Opimizer state: Xi: {opt.Xi[-j-1]}, yi: {opt.yi[-j-1]}")
         except KeyboardInterrupt:
             print('User interrupted..')