RFR: 8267174: Many test files have the wrong Copyright header

[Jonathan Gibbons]

On Tue, 5 Sep 2023 22:49:41 GMT, Erik Joelsson <erikj at openjdk.org> wrote:

> There are a number of files in the `test` directory that have an incorrect copyright header, which includes the "classpath" exception text. This patch removes that text from all test files that I could find it in. I did this using a combination of `sed` and `grep`. Reviewing this patch is probably easier using the raw patch file or a suitable webrev format.
> 
> It's my assumption that these headers were introduced by mistake as it's quite easy to copy the wrong template when creating new files.

One has to wonder about the `**/*_OLD.java` files, but that would be a different cleanup

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PR Review: https://git.openjdk.org/jdk/pull/15573#pullrequestreview-1612069262