Configurable log levels

[omix]

When using -io.qt.log-messages=true QtJambi channels all Qt loggs to Java logger. Here, every Qt message type is assigned to specific Java log level. Make this configurable.

[omix]

This feature will be available in QtJambi 6.5.1.

• -Dio.qt.log.debug.level=<level> defines the log level for QtDebugMsg (defaults to FINEST)
• -Dio.qt.log.critical.level=<level> defines the log level for QtCriticalMsg (defaults to SEVERE)
• -Dio.qt.log.fatal.level=<level> defines the log level for QtFatalMsg (defaults to SEVERE)
• -Dio.qt.log.info.level=<level> defines the log level for QtInfoMsg (defaults to INFO)
• -Dio.qt.log.warning.level=<level> defines the log level for QtWarningMsg (defaults to WARNING)

All specified values have to be parsable by Level.parse(String).