This enhancement adds the ability to automatically reschedule load balancers from LBaaS agents that the server detects as dead. Previously, load balancers could be scheduled and realized across multiple LBaaS agents, however if a hypervisor died, the load balancers scheduled to that node would cease operation. With this update, these load balancers will be automatically rescheduled to a different agent. This feature is disabled by default and managed using `allow_automatic_lbaas_agent_failover`.