RFR: 8310049: Refactor Charset tests to use JUnit [v2]

[Justin Lu]

On Thu, 15 Jun 2023 19:52:55 GMT, Lance Andersen <lancea at openjdk.org> wrote:

>> Justin Lu has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Review: Refactoring does not require bugID in test
>
> test/jdk/java/nio/charset/Charset/AvailableCharsetNames.java line 25:
> 
>> 23: 
>> 24: /* @test
>> 25:  * @bug 4422044 8310049
> 
> As this is just a refactor, I don't think you need the bug number for converting to junit

Fixed, in this file and the others

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PR Review Comment: https://git.openjdk.org/jdk/pull/14500#discussion_r1231478728