RFR: 8306133: Open source few AWT Drag & Drop related tests

[Phil Race]

On Fri, 21 Apr 2023 21:33:00 GMT, lawrence.andrews <duke at openjdk.org> wrote:

>> This PR open sources few AWT DnD related tests
>
> test/jdk/java/awt/dnd/NextDropActionTest/NextDropActionTest.java line 159:
> 
>> 157:             }
>> 158:         } finally {
>> 159:             if (frame != null) {
> 
> frame is created with in EDT but disposing without EDT ?

There's no harm in doing that but I'm not sure its necessary for the dispose().

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PR Review Comment: https://git.openjdk.org/jdk/pull/13591#discussion_r1174191617