Confmon: log revision ID

Change-Id: Ibced5b4ccae007b37960436b63fad33ada197e2d
Reviewed-on: http://review.couchbase.org/41978
Reviewed-by: Sergey Avseyev <sergey.avseyev@gmail.com>
Tested-by: Mark Nunberg <mnunberg@haskalah.org>