RFR: JDK-8267936: PreserveAllAnnotations option isn't tested

[Jaroslav Tulach]

On Tue, 1 Jun 2021 09:30:40 GMT, Jaroslav Tulach <github.com+26887752+JaroslavTulach at openjdk.org> wrote:

> There doesn't seem to be much support for the complete changes in #4245. To get at least something useful from that endeavor I have extracted the test for existing behavior of `-XX:+PreserveAllAnnotations` and I am offering it in this pull request without any changes to the JVM behavior.

FYI: The current test is a "mirror" copy of [AnnotationTypeRuntimeAssumptionTest.java](https://github.com/openjdk/jdk/blob/0f689ea8f29be113cc8a917a86fd9e0f85f921fc/test/jdk/java/lang/annotation/AnnotationType/AnnotationTypeRuntimeAssumptionTest.java) with adjustments to cover the `CLASS`->`RUNTIME` migration.

> What I would do is to add a patch for the parser bug 

That's an interesting discovery! I see a patch and I can include it as your commit in this PR, if there is a test...

> and then extend the test in 3 dimensions:

...or just take my PR and expand it. Also the checkbox _"Allow edits and access to secrets by maintainers"_ is on - e.g. this PR is open for modifications.

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PR: https://git.openjdk.java.net/jdk/pull/4280