RFR: JDK-8016524: [macosx] Bottom line is not visible for JTableHeader [v5]

[Harshitha Onkar]

On Mon, 7 Feb 2022 09:06:06 GMT, Prasanta Sadhukhan <psadhukhan at openjdk.org> wrote:

>> I see it fails for me in mac 10.15..DId you see it pass locally for you and in CI systems? Also, it should show 3 rows including row showing "A""B""C" as it is shown in windows/ubuntu, why it is showing only 1 row here?
>> 
>> <img width="1044" alt="Screenshot 2022-02-07 at 2 19 08 PM" src="https://user-images.githubusercontent.com/43534309/152755889-a148fd24-3b62-4e86-a3f5-5b8c0c989f77.png">
>
> I got the 2nd part of the question myself which is because of white gridlines used in AquaLookAndFeel so invisible..

@prsadhuk It passes in my local (mac 11.6.2) and in CI systems as well. 

![image](https://user-images.githubusercontent.com/95945681/152841823-3d41f187-6dda-4e4f-9944-eed2d161c756.png)
![image](https://user-images.githubusercontent.com/95945681/152842688-b8ed2bd2-af04-4e6f-a9b9-0001c1824386.png)

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PR: https://git.openjdk.java.net/jdk/pull/7219