RFR: 8307299: Move more DnD tests to open [v3]

[Sergey Bylokhov]

On Tue, 2 May 2023 21:07:21 GMT, Alisen Chung <achung at openjdk.org> wrote:

>> Added DnD tests
>
> Alisen Chung has updated the pull request incrementally with one additional commit since the last revision:
> 
>   moved some function calls on EDT

test/jdk/java/awt/dnd/IntraJVMGetDropSuccessTest.java line 253:

> 251: 
> 252:     public void reset() {
> 253:         clickedComponent = null;

seems here you access/reset that field on the main thread as well

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PR Review Comment: https://git.openjdk.org/jdk/pull/13759#discussion_r1184562790