CC-831: Dashboard build detail page is creating many JMX server threads

Regarding CC-831:

http://jira.public.thoughtworks.org/browse/CC-831

I recently added a patch. It attempts to hold a reference the 
JMXConnector and to close it when finished with the 
MBeanServerConnection call. However, I had trouble updating the jmock 
unit tests (see @todo comments) and I haven't fully tested if this 
change fixes the jmx connection leak. So...

1. Could someone apply this patch on their system and test to see if it 
fixes the Dashboard/jmx leak?

2. Could someone also help me figure out how to restore the two unit 
tests/fix the jmock issues?

If this patch helps, I hope it will solve a number of other 
Dashboard/Out Of Memory issues.


Thanks,
Dan


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