upgrade bucket_sasl to support executing n1ql statements
upgrade bucket_sasl to support executing n1ql statements

though this role will most likely not be used in Spock, we still
need it to be upgraded so query works correctly in mixed clusters

Change-Id: Ibc47ccb1a981913dd195455e021573b38c9cc89a
Reviewed-on: http://review.couchbase.org/73521
Tested-by: Artem Stemkovski <15a0730a27c69f62ab86f2b6c639fca202166c02@couchbase.com>
Reviewed-by: Johan Larson <5105ed78d79b274eb9b1b31aff9e2d413721d12f@couchbase.com>
Reviewed-by: Aliaksey Artamonau <3c875bcfb3adf2a65b2ae7686ca921e6c9433147@gmail.com>

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