Test git plugin with GitClient decorator reordering

[MarkEWaite]

Test git plugin with GitClient decorator reordering

Confirm that tests in the BOM do not expose some dependency on the previous location of decorator processing.

• https://github.com/jenkinsci/git-plugin/pull/1649

Testing done

Unit tests pass in the git plugin.

Submitter checklist

• [x] Make sure you are opening from a topic/feature/bugfix branch (right side) and not your main branch!
• [x] Ensure that the pull request title represents the desired changelog entry
• [x] Please describe what you did
• [x] Link to relevant issues in GitHub or Jira
• [x] Link to relevant pull requests, esp. upstream and downstream changes
• [x] Ensure you have provided tests - that demonstrates feature works or fixes the issue

[MarkEWaite]

Tests passed.