RFR: JDK-8290469: Add new positioning options to PassFailJFrame test framework [v6]

[Phil Race]

On Fri, 5 Aug 2022 19:18:21 GMT, Alexey Ivanov <aivanov at openjdk.org> wrote:

>> Harshitha Onkar has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   added null check in positionWindow
>
> test/jdk/java/awt/regtesthelpers/PassFailJFrame.java line 309:
> 
>> 307:             } catch (InterruptedException e) {
>> 308:                 e.printStackTrace();
>> 309:             }
> 
> Is it safe to call on EDT?
> 
> If `positionTestWindow` is not to be called on EDT, should it be enforced?

The intention is that it can be called either way - on or off.

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PR: https://git.openjdk.org/jdk/pull/9525