Comment 1 for bug 1612069

In this 16s time, assuming that a HA router meets 8 times HA router state change.
After this 16s, the first change dequeue and be notified to neutron server, then the 2nd, 3rd, and so on.
This now become interesting, in this 16 seconds if you use neutron
`neutron l3-agent-list-hosting-router ha_router_id`
you may see the router state in one agent is alternatively changing in active and standby.
It's not stay in the real state, because of the delay notification.