Implement synchronize_everything for ns_couchdb_config_rep.
Implement synchronize_everything for ns_couchdb_config_rep.

Change-Id: I1deb95174f9519e96d695c5ade48c1a3fe190736
Reviewed-on: http://review.couchbase.org/73727
Tested-by: Aliaksey Artamonau <3c875bcfb3adf2a65b2ae7686ca921e6c9433147@gmail.com>
Reviewed-by: Artem Stemkovski <15a0730a27c69f62ab86f2b6c639fca202166c02@couchbase.com>

ceejatec/ns_server,membase/ns_server,membase/ns_server,ceejatec/ns_server,ceejatec/ns_server,ceejatec/ns_server,membase/ns_server,membase/ns_server,ceejatec/ns_server,ceejatec/ns_server,membase/ns_server,membase/ns_server