[kie-issues#653] Don't use System.out and logger debug mode in test output in traits

[baldimir]

Fixes apache/incubator-kie-issues#653

• Changes logger debug mode in tests in the whole repository
• Replaces or removes the use of System.out or System.err in drools-traits tests. When an occurence is replaced, it is replaced with logger.

@jstastny-cz this should fix the huge logs you reported from drools-traits in the CI logs.

[jstastny-cz]

I will review the PR check logs in the morning, but seems promising ;-) Thanks.

[jstastny-cz]

Thanks, looks good.

Just for the record I see some seemingly sysout prints still:
[INFO] Running org.drools.decisiontable.SpreadsheetCompilerUnitTest
[INFO] Running org.drools.model.codegen.execmodel.AccumulateTest
[INFO] Running org.drools.model.codegen.execmodel.CepTest
[INFO] Running org.drools.model.codegen.execmodel.CompilationFailuresTest
[INFO] Running org.drools.model.codegen.execmodel.FromTest
(and generally codegen tests seem to be quite verbose)

[INFO] Running org.drools.mvel.integrationtests.concurrency.ConcurrentInsertionsToSubnetworksTest
[INFO] Running org.drools.mvel.integrationtests.QueryInRHSCepTest - this one has exception stack trace printed

etc.

But the drools-traits tests seem alright, which was the scope tackled in this one.