test/sun/java2d/OpenGL/GradientPaints.java

rev 14031 : 8159690: [TESTBUG] Mark headful tests with @key headful.

Backport of 14851:980da45565c8 from jdk9.  542/842 hunks applied directly from
the patch. 44 I resolved manually.  The remaining hunks are for filenames that
do not exist in jdk8u.

@@ -21,10 +21,11 @@
  * questions.
  */
 
 /*
  * @test
+ * @key headful
  * @bug 6521533 6525997
  * @summary Verifies that the OGL-accelerated codepaths for GradientPaint,
  * LinearGradientPaint, and RadialGradientPaint produce results that are
  * sufficiently close to those produced by the software codepaths.
  * @run main/othervm -Dsun.java2d.opengl=True GradientPaints