RFR: 8306137: Open source several AWT ScrollPane related tests

[Tejesh R]

On Mon, 24 Apr 2023 18:59:29 GMT, Alexey Ivanov <aivanov at openjdk.org> wrote:

>> Open source few AWT ScrollPane related tests.
>
> test/jdk/java/awt/ScrollPane/RemoveChild/ScrollPaneRemoveAdd.java line 94:
> 
>> 92:             robot.mouseRelease(InputEvent.BUTTON1_DOWN_MASK);
>> 93: 
>> 94:             Toolkit.getDefaultToolkit().sync();
> 
> Shouldn't `sync` be replaced with `Robot.waitForIdle`?

Not sure y both has been used here, will remove sync and test in CI, if its fine there then can be removed.

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PR Review Comment: https://git.openjdk.org/jdk/pull/13621#discussion_r1176017290