MB-19579: Enable update notifications during cluster-init
MB-19579: Enable update notifications during cluster-init

By default we will always enable update notifications. If users
wish to disable the then they can do so using the setting-notfication
command.

Change-Id: I5f54a0d3a2474814f66aa6bfa4b9126acd230808
Reviewed-on: http://review.couchbase.org/63990
Reviewed-by: Eben Haber <d1abc94d70526bfcf3e4b0ce727cb9a6fbb52a3a@couchbase.com>
Tested-by: Michael Wiederhold <a17fed27eaa842282862ff7c1b9c8395a26ac320@couchbase.com>

couchbase/couchbase-cli,couchbase/couchbase-cli