MBeans tab: bad parsing of ObjectNames in tree leads to incorrect tree display

The parsing of ObjectNames by the jconsole mbean tab's tree view would appear
to be incorrect, not catering for ObjectName values that are quoted.

e.g. for an ObjectName of the form:

domain:type=association,parent="domain:type=node,name=\"node1\"",child="domain:type=node,name=\"node2\""

then the tree will not show a tree with three nodes (type, parent, child) but will incorrectly parse the ObjectName and will display a tree with 7 nodes (one for each '=' sign).