jenkinsci/promoted-builds-plugin — pull request #32 by fivehole68 (2013-09-24 23:02:08+00:00)
Title: Added user display name and email address to promotion variables

Added the ability to push PROMOTED_USER and PROMOTED_EMAIL

PROMOTED_USER is the display name for the logged in user at promotion time.
PROMOTED_EMAIL is the email address associated with that user.

I think this resolves this issue.
https://issues.jenkins-ci.org/browse/JENKINS-16063

Thanks.