branch-2.0.2 manifest uses latest ns_server master branch.

Change-Id: If6739f323002d92b4909f84a9e0815ac087570a3
Reviewed-on: http://review.couchbase.org/24570
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>