RFR: 8159523. Fix tests depending on absence of -limitmods in VM arguments.

[Alexandre (Shura) Iline]

Hi,

Please review a fix for https://bugs.openjdk.java.net/browse/JDK-8159523

To recap what has happened in the past.

1. An attempt was made to enhance jdk.testlibrary.ProcessTools class to support some filtering java and VM options. That implementation came out really overloaded (check executeModularTest(...) in [1]).
2. It was suggested that a builder API could be introduced instead. “toolbox” classes from langtools test library were suggested as a start [2].
3. Further on, it was agreed that the classes need to be copied into the JDK test library rather than updated in place or somehow else shared between langtools and jdk test libraries.

I have started porting a few tasks (JavaTask, JavacTask and JarTask) only to realize that there are many questions which may cause design discussions. So, instead, I have rolled back to one class (JavaTask) and the superclasses. If the design is acceptable, more tasks could be added as needed.

The webrev: http://cr.openjdk.java.net/~shurailine/8159523/webrev.01/

Thank you.

Shura

[1] http://cr.openjdk.java.net/~shurailine/8159523/webrev.00/test/lib/testlibrary/jdk/testlibrary/ProcessTools.java.sdiff.html
[2] http://hg.openjdk.java.net/jdk9/jdk9/langtools/file/8e9e1a2373a4/test/tools/lib/toolbox