RFR(S): 8152358 - code and comment cleanups found during the hunt for 8077392

[Daniel D. Daugherty]

Greetings,

As a follow on to my fix for the following bugs:

     JDK-8077392 Stream fork/join tasks occasionally fail to complete
     https://bugs.openjdk.java.net/browse/JDK-8077392

     JDK-8131715 backout the fix for JDK-8079359 when JDK-8077392 is fixed
     https://bugs.openjdk.java.net/browse/JDK-8131715

I have a fix for the following bug:

     JDK-8152358 code and comment cleanups found during the hunt for 8077392
     https://bugs.openjdk.java.net/browse/JDK-8152358

These cleanups are pretty straight forward so I'm not going to
include the usual long, detailed analysis... :-)

Here is the webrev URL:

http://cr.openjdk.java.net/~dcubed/8152358-webrev/0-jdk9-hs-rt/

This webrev is a superset of the webrev for the JDK-8077392 and
JDK-8131715 fixes and is the code that I'm currently testing...

Testing:

- the original failing test is running in a parallel stress config
   on my Solaris X64 server; just under 23 hours and just under
   3000 iterations without a failure in either instance; I'm planning
   to let the stress run go for at least 72 hours.
- RT/SVC nightly equivalent (in progress)

As always, comments, suggestions and/or questions are welcome.

Dan