tuning time and metric score fixes
Created by: v1docq
https://github.com/nccr-itmo/FEDOT/issues/559 https://github.com/nccr-itmo/FEDOT/issues/560 The calculation of the time allocated for tuning hyperparameters has been changed, depending on the time that was actually spent on composing. Small changes in the calculation of the quality metric when tuning hyperparameters.