Unable to generate PMML model in kie server integration tests

It is not possible to generate PMML model when building kjar in Kie server integration tests. It fails with the following exception:

```

[INFO] Running org.kie.server.integrationtests.pmml.ApplyScorecardModelIntegrationTest
10:25:42.305 [pool-26-thread-1] INFO o.k.s.i.shared.ProcessExecutor - [ERROR] Failed to execute goal org.kie:kie-maven-plugin:7.60.0-SNAPSHOT:generatePMMLModel (default-generatePMMLModel) on project pmml-trusty-scorecard-compiled: ExternalException: NullPointerException -> [Help 1]
10:25:42.308 [pool-26-thread-1] INFO o.k.s.i.shared.ProcessExecutor - org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.kie:kie-maven-plugin:7.60.0-SNAPSHOT:generatePMMLModel (default-generatePMMLModel) on project pmml-trusty-scorecard-compiled: ExternalException
10:25:42.309 [pool-26-thread-1] INFO o.k.s.i.shared.ProcessExecutor - at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:215)

```

Following tests are affected:

• ApplyClusteringModelIntegrationTest
• ApplyMiningModelIntegrationTest
• ApplyRegressionModelIntegrationTest
• PMMLApplyModelBaseTest
• ApplyScorecardModelIntegrationTest
• PMMLApplyModelBaseTest.setup
• ApplyTreeModelIntegrationTest
• PMMLApplyModelBaseTest