test/java/awt/dnd/AcceptDropMultipleTimes/AcceptDropMultipleTimes.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.

@@ -21,10 +21,11 @@
  * questions.
  */
 
 /**
  * @test
+ * @key headful
  * @bug 8029979
  * @summary Checks if acceptDrop() can be called several times
  * @library ../../regtesthelpers
  * @build Util
  * @compile AcceptDropMultipleTimes.java