RFR: 8337851: Some tests have name which confuse jtreg [v3]

[toshiogata]

On Fri, 16 Aug 2024 01:02:17 GMT, toshiogata <duke at openjdk.org> wrote:

>> test/langtools/tools/javac/warnings/Serial/Serial.java line 1:
>> 
>>> 1: /*
>> 
>> move jtreg tags below imports and add copyrights
>
> The copyright has been intentionally omitted as explained in https://bugs.openjdk.org/browse/JDK-8258525
> I moved the jtreg tag.

For the reason aivanov-jdk commented, I would like to only rename files in this PR.

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PR Review Comment: https://git.openjdk.org/jdk/pull/20475#discussion_r1721122202