RFR: 8346463: Add test coverage for deploying the default provider as a module

[Brian Burkhalter]

On Tue, 17 Dec 2024 18:16:49 GMT, Alan Bateman <alanb at openjdk.org> wrote:

> test/jdk/java/nio/file/spi/SetDefaultProvider.java tests deploying with a custom file system provider as the default provider. The test is moved to JUnit and is updated with new tests that deploy the custom default provider on the module path. To support the different deployments, TestProvider is moved into a named package and module.
> 
> In preparation for JDK-8331467, a test is added to create a run-time image that contains the custom default file system provider.

This looks all right to me.

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Marked as reviewed by bpb (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/22797#pullrequestreview-2513096411