RFR: 8301569: list mode of jmod and jimage cannot be used normally in turkish locale

[Glavo]

On Wed, 1 Feb 2023 07:20:13 GMT, Alan Bateman <alanb at openjdk.org> wrote:

> The equivalent in jlink and jimage are using Locale.ENGLISH, I guess we should try to keep them consistent.

This class is using `Locale.ROOT` to convert modifiers to lowercase, and there is no reference to `Locale.ENGLISH`.

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PR: https://git.openjdk.org/jdk/pull/12281