Drools and KIE are too chatty on INFO logging (= default for spring-boot).

This makes us look like bloatware on spring-boot:

Can we make all these log messages DEBUG level?
No user that looks at the logs cares that we're reading a kie.conf file or adding a kie service. Actually, let's make them TRACE

Drools should have zero or one info message when creating a kie factory and kie session. Anything more is unacceptable.