RFR: 8323717: Introduce test keyword for tests that need external dependencies

[Aleksey Shipilev]

On Tue, 23 Jan 2024 01:32:45 GMT, David Holmes <dholmes at openjdk.org> wrote:

> Seems quite reasonable.

Thanks!

I shall wait for more reviewers, in case someone has an issue with `external-dep` as the flag name.

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PR Comment: https://git.openjdk.org/jdk/pull/17421#issuecomment-1905719123