test/javax/swing/RepaintManager/IconifyTest/IconifyTest.java

rev 14031 : 8160974: [TESTBUG] Mark more headful tests with @key headful.

This is a backport of fe58d505fffd from jdk9. 228/596 hunks apply without
modifications. 16 hunks required manual rework. The remainder were for files
not present in jdk8u.

@@ -20,10 +20,11 @@
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */
 /*
  * @test
+ * @key headful
  * @bug 4665214
  * @summary Makes sure that RepaintManager doesn't attempt to repaint
  *          a frame when it is iconified.
  * @author Scott Violet
  * @run main IconifyTest