test/java/awt/TextArea/TextAreaEditing/TextAreaEditing.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 8040322
  @summary Test TextArea APIs replaceRange, insert, append & setText
  @run main TextAreaEditing
  */