RFR (S/M): 8219096: Merge print_termination_stats code with current logging

[Thomas Schatzl]

Hi,

  can I have reviews for this change that merges the termination
statistics into the regular log file (there were only two metrics left,
LAB waste and LAB undo waste), and remove the termination stats
afterwards?

I (very) rarely use these metrics, so I thought it would be better to
keep them (and not just removing the entire termination stats).

I was undecided whether it would be good to hide these under the
gc+phases=trace level though, so opinions welcome.

CR:
https://bugs.openjdk.java.net/browse/JDK-8219096
Webrev:
http://cr.openjdk.java.net/~tschatzl/8219096/webrev/
Testing:
log output verification, test case update

Thanks,
  Thomas