Wrong output variable values in PMML mining model

Output variable values of mining model in PMML are wrong. See for example outputs of https://github.com/kiegroup/drools/blob/master/kie-pmml/src/test/java/org/kie/pmml/pmml_4_2/predictive/models/mining/MiningModelSumRegressionTest.java#L83

There are two output variables and for example for this case https://github.com/kiegroup/drools/blob/master/kie-pmml/src/test/java/org/kie/pmml/pmml_4_2/predictive/models/mining/MiningModelSumRegressionTest.java#L57 values are:

• Sum_Result=2070 (correct value)
• Result=670 (result only for the first model)

We need variable "Result" to also have value 2070