RFR(XS): 8167001: [TESTBUG] java/lang/instrument/DaemonThread/TestDaemonThread.java fails when run by jprt

[Chris Plummer]

Hello,

Please review the following:

https://bugs.openjdk.java.net/browse/JDK-8167001
http://cr.openjdk.java.net/~cjplummer/8167001/webrev.00/webrev.jdk/

This fixes an issue with the classpath not being passed to the 
subprocess, resulting in the main class for the subprocess not being 
found. It only turns up when running the test with "agentvm", which is 
the default when running the test via test/Makefile (which is what jprt 
uses). "othervm" seems to be the default when running jtreg directly 
from the command line, so it doesn't see this problem.

Although there are still ongoing discussion of jtreg classpath 
definition differences between "agentvm" mode and "othervm" mode, 
existing tests fix this issue by explicitly passing the classpath to the 
subprocess. This is usually done by passing "true" as the first argument 
to ProcessTools.createJavaProcessBuilder(), so I'd like to go with this 
fix for now. This is actually the default behavior for hotspot/test. For 
jdk/test the default is "false" so you need to explicitly pass "true".

Tested by running with jprt under conditions where the test was 
previously failing. Also tested by running the test directory locally 
using jdk/Makefile (which previously was failing).

thanks,

Chris