Geode classes should use Log4J2 Logger instead of JUL or LogWriter

Several classes including AbstractLauncher are using JUL instead of Log4J2:

import java.util.logging.Logger;
...
// TODO: use log4j logger instead of JUL
protected Logger logger = Logger.getLogger(getClass().getName());

Any other classes that are using a logger or logwriter that isn't from Log4J2 API should be modified to use Log4J2.