RFR (XXS): 8133043: Clean up code related to termination stats printing

[Thomas Schatzl]

Hi all,

  can I have some reviews for the following change that cleans up and
reformats the code and usage related to G1 termination stats?

Stuff like not using braces around if-clauses, dropping an extra
temporary lock, linebreaks in string constants, line breaks in the
definition of the methods, superfluous additional parameters.

I generally do not do reformatting changes, but every time I browse
through that code it gives me an urge to fix that.

CR:
https://bugs.openjdk.java.net/browse/JDK-8133043
Webrev:
http://cr.openjdk.java.net/~tschatzl/8133043/webrev/
Testing:
compilation, gcbasher run with -XX:+PrintTerminationStats, jprt

Thanks,
  Thomas