Tests DecisionTreeTest.testMissingTreeWeighted1 and testMissingTreeWeighted2 fail on Windows

Two tests in class DecisionTreeTest fail when they run on Windows, because they try to create a log file on a Linux path [1]. I will provide a fix for the tests.

[1] https://github.com/baldimir/drools/blob/133890cbdcdcc0dd9ea4f3a775fcae81aabdb1c2/kie-pmml/src/test/java/org/kie/pmml/pmml_4_2/predictive/models/DecisionTreeTest.java#L200