Add a system property that permits to control the verbosity of Janus.
Add function for logging finer info messages.
Add CLI options '-v' and '-q'.
Create the loggers from the platform configuration. The platform configuration includes the logging property file, and the log level given in the JanusConfig.
Hazelcast is using the logging service of the platform in place of its "private" loggers.
The logging level may be control from the CLI.
The CLI options "-log", "-v", and "-q" are added to control the logging level.