Load Balancer Pool Members with stacks

It looks like the Neutron::LoadBalancer object requires all members up front. If you want to have other stacks add entries into your load balancer, you are out of luck. Looking at the neutron lbaas api they have a pool member api:

{
      "member" : {
                   "address": "192.168.224.31",
                   "protocol_port": 8080,
                   "pool_id": "cfc6589d-f949-4c66-99d2-c2da56ef3764"
                 }
}

It looks like perhapse there should be a Neutron::LoadBalancerPoolMember type similar to a Neutron::Port type, that lets you specify one of these things at a time, rather then all at once.

Note, it also does not take in an instance, but an IP address, which will also fix a different issue of using heat to add instances with multiple neutron ports.