RFR(T) : 8226905 : unproblem list applications/ctw/modules/* tests on windows

[Igor Ignatyev]

http://cr.openjdk.java.net/~iignatyev//8226905/webrev.00
> 4 lines changed: 0 ins; 4 del; 0 mod

Hi all,

could you please review this tiny and trivial patch which unproblem-lists applications/ctw/modules/java_desktop.java, java_desktop_2.java, and jdk_jconsole.java tests?

from JBS:
> applications/ctw/modules/java_desktop.java, applications/ctw/modules/java_desktop_2.java, and applications/ctw/modules/jdk_jconsole.java were problem-listed due to JDK-8205016. further analysis showed that it's rather a configuration issue -- we run these tests on hosts which look like headful but aren't properly configured, so when awt gets initialized it (most probably) rightfully complains about that and show an error message box. 
> 
> the solution was to run these tests on headful hosts or w/ "-Djava.awt.headless=true".

testing: the affected tests on windows hosts w/ -Djava.awt.headless=true
JBS: https://bugs.openjdk.java.net/browse/JDK-8226905
webrev: http://cr.openjdk.java.net/~iignatyev//8226905/webrev.00/index.html

Thanks,
-- Igor