When a single placeholder is created for a request serving node (because a previous node existed of the same size), no machineset scale up occurs.

    4.16.0

    Always

    1. Setup a management cluster with request serving and autoscaling machinesets
    2. Create a HostedCluster of size small 
    3. Manually scale up the corresponding large machineset (in same osdfleetmanager pair)
     4. Increase the HostedCluster size to large

    The large machinesets are never scaled up for the cluster

    The hosted cluster moves up to large machines for request serving

    When a single placeholder is created for request serving nodes, no machineset scale up occurs.