RFR: 8340360: Update -mx to -Xmx in UnninstallUIMemoryLeaks test

[Jaikiran Pai]

On Wed, 18 Sep 2024 09:06:04 GMT, Jaikiran Pai <jpai at openjdk.org> wrote:

> Can I please get a review of this test-only change which replaces the use of the outdated "-mx" option with the "-Xmx" option when launching the java processes in this test? This test was missed out from one of the earlier integrated PR.
> 
> The test continues to pass after this change.

Thank you Phil and Sergey for the reviews.

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PR Comment: https://git.openjdk.org/jdk/pull/21053#issuecomment-2359793882