Refactor HarakiriMonitor into its own package

Change-Id: I5f74d33bfa36e351c32fbe869bef13cc6367201f
Reviewed-on: http://review.couchbase.org/27117
Tested-by: Mark Nunberg <mnunberg@haskalah.org>
Reviewed-by: Sergey Avseyev <sergey.avseyev@gmail.com>