Please review this change.
ThreadMXBean#setThreadCpuTimeEnabled(true) assumes read-write access to
the underlying JVM, but if read-access is only available plug-in will
fail and throw an exception.
http://monaco.us.oracle.com/detail.jsf?cr=6696975
Unexpected exceptions occurring in JConsole are taken care of by
6696970, but plug-in should still handle read-only access gracefully, as
it today does if functionality is not supported by JVM. This can be
important if plug-in is used by other programs.
Webrev:
http://cr.openjdk.java.net/~egahlin/6696975/
A sponsor is needed
Thanks
Erik
