MB-11314 add preconfigured roles to default config
MB-11314 add preconfigured roles to default config

we do not make them editable in watson, but in future releases
we might to add possibility to reconfigure roles

Change-Id: I1fc07247b8e4a098d92f9b653017b537ef0ffa03
Reviewed-on: http://review.couchbase.org/58476
Tested-by: Artem Stemkovski <15a0730a27c69f62ab86f2b6c639fca202166c02@couchbase.com>
Reviewed-by: Aliaksey Artamonau <3c875bcfb3adf2a65b2ae7686ca921e6c9433147@gmail.com>

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