RFR: CODETOOLS-7903400: DEFAULT_UNIX_ENV_VARS needs to be updated [v2]

[Iris Clark]

On Mon, 1 May 2023 18:41:39 GMT, Jonathan Gibbons <jjg at openjdk.org> wrote:

>> Please review a small change to add additional environment variables that may be required on some Unix-like platforms.
>> 
>> The additions include:
>> * `DBUS_SESSION_BUS_ADDRESS`
>> * `WAYLAND_DISPLAY`
>> * all `XDG_*` variables
>> 
>> There is some related additional cleanup in this area as well.
>
> Jonathan Gibbons has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Address review feedback

Marked as reviewed by iris (Reviewer).

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PR Review: https://git.openjdk.org/jtreg/pull/152#pullrequestreview-1408439332