Roger's suggested changes to PR template

These are ideas Roger had for the template. I'll let him elaborate but I think the gist of it is that more people are checking against the Jira, and ensuring we're not blocked waiting for IPs to complete code review before merging.
I put this point to Roger, he suggested that if the work doesn't do what it's supposed to do then it's essentially poor quality code which is a fair point. 

Having this as an explicit checklist item for one of the reviewers (but not both) means a quick read for a reviewer, but doesn't add more to the Software Engineer/Guru code review.