Minor Description
The configuration for a custom logging.properties is not taken into account with the tomcat6-7:run goal.
From what I've seen, the reason is that the configuration for java.util.logging is done before setting the system properties in the same class loader.
I think it could be fixed by putting a call to LogManager.getLogManager().readConfiguration(); right after setting the system properties. I'm not confident enough on the possible side effects to say it is the best solution.