RFR 8027163: sun/management/jmxremote/bootstrap/CustomLauncherTest.java should be updated for jdk8 removal of solaris-32bit support

[Jaroslav Bachorik]

Please, review the following test change:

Issue:  https://bugs.openjdk.java.net/browse/JDK-8027163
Webrev: http://cr.openjdk.java.net/~jbachorik/8027163/webrev.00/

Currently, the test is designed to work only on solaris-32bit. With the 
support removed it is necessary to adapt the test as well. This includes 
generating the solaris-sparcv9 and solaris-amd64 binaries for the 
launcher the test is using.

The test itself needs changing the way it retrieves the ARCH name for 
sparcv9 architecture. Also, since it is forbidden to check in any files 
with executable permissions the test must account for this and adjust 
the file permissions temporarily while executing. It needs to revert to 
the original permissions when it's finished to prevent reporting the 
launcher files as modified in HG.

While testing the changes the 
sun/management/jmxremote/bootstrap/LocalManagementTest.java kept failing 
intermittently (50%) when run in agentvm mode together with 
CustomLauncherTest.java on sparcv9 machines. Forcing both of these tests 
to run in othervm mode seems to fix the problem.

There is a small debugging improvement in 
ProcessTools.java#startProcess() method - when the phaser timesout or is 
interrupted all the stack traces are dumped to stderr to help diagnosing 
any locking situations.

Thanks,

-JB-