Use IPEndPoint to compare IOstrategy and Node instance for equality

Change-Id: Ibefa79e10b2c2d9481ba8102ac868041ad3512a4
Reviewed-on: http://review.couchbase.org/39987
Tested-by: Jeffry Morris <jeffrymorris@gmail.com>
Reviewed-by: Mark Nunberg <mnunberg@haskalah.org>