RFR 8129822: Define "headful" jtreg keyword

[Martin Balao]

Hi,

I'd like to propose a backport of JDK-8129822 [1] to jdk7u:

 *
http://cr.openjdk.java.net/~mbalao/webrevs/8129822/8129822.webrev.jdk7u.00/

Patch did not apply cleanly but was trivial.

Thanks,
Martin.-

--
[1] - https://bugs.openjdk.java.net/browse/JDK-8129822