network: discovery: zigbee: get active route table entry if exists

If the same route entry (destination - next hop) is repeated in the routing
table of a node but with different status, keep the "active" one.

For example:

Route of 0013A2004195C88B - usb1_100B: 0000 - 0000 -> Inactive
Route of 0013A2004195C88B - usb1_100B: 0000 - 0000 -> Active
Route of 0013A2004195C88B - usb1_100B: E814 - 27C9 -> Active
Route of 0013A2004195C88B - usb1_100B: F2E7 - 27C9 -> Active
Route of 0013A2004195C88B - usb1_100B: 27C9 - 0000 -> Active
Route of 0013A2004195C88B - usb1_100B: 0000 - 0000 -> Inactive

Two first entries are the route to the coordinator: the first one is 'Inactive',
the second one is 'Active'. In this case keep the second one.

Signed-off-by: Tatiana Leon <Tatiana.Leon@digi.com>

Author: tatianaleon

digi/xbee/devices.py

@@ -11232,6 +11232,15 @@ def __new_route_cb(xbee, route):
             # Add the new route
             if str(route.next_hop) not in routes_list:
                 routes_list.update({str(route.next_hop): route})
+            else:
+                r_in_list = routes_list.get(str(route.next_hop))
+                self._log.debug("       - ROUTE already found %s - %s -> %s",
+                                r_in_list.destination, r_in_list.next_hop, r_in_list.status)
+                from digi.xbee.models.zdo import RouteStatus
+                if r_in_list.status != RouteStatus.ACTIVE and route.status == RouteStatus.ACTIVE:
+                    self._log.debug("       - Updating route %s - %s -> %s",
+                                    route.destination, route.next_hop, route.status)
+                    routes_list.update({str(route.next_hop): route})
 
             # Check for cancel
             if self._stop_event.is_set():