NCBC-618: When bootstrapping against a cluster with a node down cccp fails

Change-Id: I7ce4e490efee02496cf809f4fab64d9200e47b7d
Reviewed-on: http://review.couchbase.org/41126
Tested-by: Jeffry Morris <jeffrymorris@gmail.com>
Reviewed-by: Brett Lawson <brett19@gmail.com>