[Reviewer Matt] Sprout changes to reenable geo-redundancy with new memcached redundancy

Matt

As discussed, can you review.  I've tested both by manually editing the remote_cluster_settings file and checking it is loaded properly at start of day and on a SIGHUP.  I've also tested by spinning up a GR system using Chef and checking the same things.  I have not done a full GR failover test.

Mike