CLI: --get for ip-family and for node-to-node-encryption doesn't work for uninitialized node

$ ../install/bin/couchbase-cli ip-family -c 127.0.0.1:9000 -u Administrator -p pass --get

ERROR: "unknown pool"

It happens because 'ip-family --get' uses ./pools/nodes which is not available until cluster is initialized

In order to work around the problem in case if /pools/default returns "unknown pool" we can get address family info for this particular node from GET /pools. But it looks like /pools should not contain address family information at all (since it is per node).

Another approach is to use /nodes/self that contain the same information about as /pools/default.