8173608: Separate JDK management agent from java.management module
Reviewed-by: dfuchs, dholmes, erikj

8081634: Concurrent usage of a StringBuilder causes test intermittent failures
Reviewed-by: sla, sspitsyn

8075926: Add a sun.management.JMXConnectorServer perf counter to track its state
Reviewed-by: duke

8023093: Add ManagementAgent.status diagnostic command
Reviewed-by: sla