8011230: [TEST_BUG] java/awt/Toolkit/BadDisplayTest/BadDisplayTest.java failed on solaris

Reviewed-by: serb, anthony

test/java/awt/Toolkit/BadDisplayTest/BadDisplayTest.sh

-# Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # This code is free software; you can redistribute it and/or modify it
@@ -22,7 +22,8 @@
 ${TESTJAVA}/bin/javac -cp ${TESTSRC} -d . ${TESTSRC}/BadDisplayTest.java
 
 
-export DISPLAY=
+DISPLAY=
+export DISPLAY
 
 OS=`uname -s`
 case "$OS" in