Placement is a core service for OpenStack deployments since OpenStack Stein when it was extracted from Nova. It is used to track resource
provider inventories and usages, along with different classes of resources (e.g. nova works closely with placement which stores RAM/disk/CPU inventory/usage).
Octavia is OpenStack's reference load balancer service. It evolved from neutron-lbaas, which is already in the exception list. Note the last release where neutron-lbaas is supported is OpenStack Stein.
Both of these services are already included in our regression testing.