Write a regression test for JDK-4820080 : RFE: Cannot Change the JSplitPane Divider Color while dragging

Issue(as per bug description):
I want to change the color of the JSplitPane divider. I
opened the code and found that, the color is hard coded to
darkGray while one is dragging the splitDivider. I have an
application where the components on SplitPane have black
background, So when i drag I can not see the split getting
dragged. Can some one fix this, by externelising the
SplitDivider color so that it can be changed at run time.

Testing:
Java 1.4.1 -> Test Failed.
$ ./j2sdk1.4.1/bin/java JSplitPaneDragColorTest
Metal uses correct drag color false
CDE/Motif uses correct drag color false
Windows uses correct drag color false
Test Failed.

Java 1.5.0 -> Test Failed.
$ ./jdk1.5.0/bin/java JSplitPaneDragColorTest
Metal uses correct drag color true
Windows uses correct drag color true
Windows Classic uses correct drag color true
Test Passed.