8021003: java/util/logging/Logger/getGlobal/TestGetGlobalConcurrent.java fails intermittently
8019945: test/java/util/logging/LogManagerInstanceTest.java failing intermittently
This fix untangles the class initialization of Logger and LogManager, and also cleans up the relationship between LogManager, LoggerContext, and Logger, which were at the root cause of some intermittent test failures.
Reviewed-by: mchung, martin, plevart
Break logging and AWT circular dependency, which was at the root cause for 8023258 - Logger.getLogger() after ImageIO.read() returns different logger instance
Reviewed-by: mchung, art
