Inconsistent results of expert induction for regression and survival

[cezary986]

Problem description:
At the moment for unknown reasons results obtained while using the wrapper are different than the ones obtained using orignal Java package for expert regression and survival rules induction.

Minimal example to reproduce error:
See:

• tests.test_regression.TestExpertRegressor.test_compare_with_java_results
• tests.test_survival.TestExpertSurvivalLogRankTree.test_compare_with_java_results

[cezary986]

Fixed in v2.1.16.0