Remove Optional from the Jetty settings class

[pks-1981]

Proposal:
Jetty settings.
Removing Optional.

References

N/A

Submitter checklist

• The PR request is well described and justified, including the body and the references
• The PR title represents the desired changelog entry
• The repository's code style is followed (see the contributing guide)
• Test coverage that demonstrates that the change works as expected
• For new features, there's necessary documentation in this pull request or in a subsequent PR to wiremock.org

[pks-1981]

@tomakehurst @timtebeek
Hello
Plz review it

[timtebeek]

Thanks for your continued effort here @pks-1981. I do feel I have to point out I don't currently have any special privileges on this repository, so apart from providing feedback on your pull request like any other GitHub user, I can't approve or merge your PRs at this time.