RFR: JMC-6122: Method profiling rule should show the hottest path

[Joshua Matsuoka]

Hi,

The following patch addresses JMC-6122 by changing the grouping aggregator
to instead group on stack trace so we can retrieve the hottest path
alongside the hottest method and display it in the rule results.


As for the comment on the bug [1], I think that belongs more in a separate
bug addressed by another patch.

Thoughts?

[1]