RFR: Initial section on testing [v9]

Tue Oct 27 11:14:29 UTC 2020

On Thu, 22 Oct 2020 20:11:27 GMT, Jesper Wilhelmsson <jwilhelm at openjdk.org> wrote:

>> It's a start.
>
> Jesper Wilhelmsson has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Added note about TEST.properties

Marked as reviewed by lancea (no project role).

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PR: https://git.openjdk.java.net/guide/pull/30