Restore ns_server remote back to couchbase/2.1.1

Change-Id: I05c3d76c11fe737d6ce7e7fa7e27ec0811b4106d
Reviewed-on: http://review.couchbase.org/27182
Reviewed-by: Jin Lim <jin@couchbase.com>
Tested-by: Jin Lim <jin@couchbase.com>