Add ability to service service types

It is useful to cluster_connect nodes with services in addition
to KV. So add a parameter to specify node services. First node
is always a pure KV node.

Change-Id: Idaeb8a9b0702088363ad7f4d9b844c32f5504ace
Reviewed-on: http://review.couchbase.org/44656
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>