PULL_REQUEST_TEMPLATE

**Description**
- See [JENKINS-XXXXX](https://issues.jenkins-ci.org/browse/JENKINS-XXXXX).

**Submitter checklist**
- [ ] Link to JIRA ticket in description, if appropriate.
- [ ] Change is code complete and matches issue description
- [ ] Appropriate unit or acceptance tests or explanation to why this change has no tests

**Reviewer checklist**
- [ ] Run the changes and verified the change matches the issue description
- [ ] Reviewed the code
- [ ] Verified that the appropriate tests have been written or valid explanation given

@reviewbybees