Adding a merge post build option.  If the build is successful then the merge command will be sent to github, and the pull request will be closed.
Changing project version back
Mark the build as passed if the trigger phrase is required, but not sent.  Just don't merge it
Updating test cases and keeping the commentor details.
Updating version of jenkins
Updating version of git plugin
Returning jenkins version as that didn't fix the issue.  Updating the tests and relevant files so the integration tests will pass.
Merge pull request #43 from DavidTanner/master

Adding pull request merge task