Replace node_id to node_uuid on Ports

The commit https://review.openstack.org/#/c/56682/ introduced node_uuid
for Ports in the Ironic API, this patch adjusts the client to reflect
that change.

Change-Id: Iae9ee8c5cadeae7803f74cca010bb6f8683667c0
Merge "Replace node_id to node_uuid on Ports"