l3ha: fix status updates

In the scenario of a failover, since the state is not updated, the
router status remains as 'backup' in the agent and it skips on
checking it's status.

This patch updates the router info once there is updates to the
HA state so that it can force a status update correctly.

Change-Id: Id3ec0ec2517d0c8f09c558c25ceb53f7c9fdbcf5
(cherry picked from commit d8bf2a1cc5)

neutron_vpnaas/services/vpn/agent.py

@@ -88,6 +88,10 @@ class VPNAgent(l3_extension.L3AgentExtension):
         state = data['state']
         for device_driver in self.device_drivers:
             if router_id in device_driver.processes:
+                # NOTE(mnaser): We need to update the router object so it has
+                #               the new HA state so we can do status updates.
+                device_driver.routers[router_id].ha_state = state
+
                 process = device_driver.processes[router_id]
                 if state in ('master', 'primary'):
                     process.enable()