
This patch switches the code over to the payload style of callbacks [1] for PORT AFTER_CREATE events. In addition it adds a branch/shim to the dhcp_rpc_agent_api to support both payload and kwarg style callbacks. NeutronLibImpact [1] https://docs.openstack.org/neutron-lib/latest/contributor/callbacks.html Change-Id: I25d43d4f8f2390b07e0d11c631f894d88669bbe0