Update lbapi client to query ipam ip addresses for node

[rizzza]

Summary

• Update the loadbalancer-api client to query the supergraph for the ipam service ip addresses belonging to loadbalancer

Playing with the ipam graph, the behavior here appears to be what we need to get loadbalancer ip addresses once we start hitting the supergraph router.

Example IPAddressable query to supergraph

query Loadbalancer {
  loadBalancer(id: "loadbal-dne") {
    id
    name
    owner {
      id
    }
    ... on IPAddressable {
      IPAddresses {
        id
        ip
        reserved  
      }
    }
    ports {
      edges {
        node {
          name
          id
          pools {
            id
            name
            protocol
            origins {
              edges {
                node {
                  id
                  name
                  target
                  portNumber
                }
              }
            }
          }
        }
      }
    }
  }
}

Example query to ipam

query GetAddressByNode {
  _entities(representations:{__typename: "IPAddressable", id: "loadbal-gidxrandovalue"}) {
    ... on IPAddressable {
      id
      IPAddresses {
        id
        ip
        reserved  
      }
    }
  }
}

ipam query result

{
  "data": {
    "_entities": [
      {
        "id": "loadbal-gidxrandovalue",
        "IPAddresses": [
          {
            "id": "ipamipa-8IPzP37YJ1iTxJdMrCods",
            "ip": "192.168.1.42",
            "reserved": false
          },
          {
            "id": "ipamipa-rPBY83fPw6Ll5sueCMpDr",
            "ip": "192.168.1.1",
            "reserved": true
          }
        ]
      }
    ]
  }
}