### 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
- [ ] Link to relevant issues in GitHub or Jira
- [ ] Link to relevant pull requests, esp. upstream and downstream changes
- [x] Ensure you have provided tests - that demonstrates feature works or fixes the issue
@basil Yeah, I was recently made aware of the differences in class loading for the JenkinsRule vs. RealJenkinsRule but did not yet come around to adding it here. I have it on my list.
Add Smoke Test for HttpClient5.
Testing done
Smoke Test was added.