Update the router status after start network

Start network can possible start the router as well. If it's already started by
start network, then we won't need to start it again.

server/src/com/cloud/network/router/VirtualNetworkApplianceManagerImpl.java

@@ -2690,6 +2690,12 @@ public class VirtualNetworkApplianceManagerImpl implements VirtualNetworkApplian
             }
         }
 
+        //After start network, check if it's already running
+        router = _routerDao.findById(routerId);
+        if (router.getState() == State.Running) {
+            return router;
+        }
+
         UserVO user = _userDao.findById(UserContext.current().getCallerUserId());
         Map<Param, Object> params = new HashMap<Param, Object>();
         if (reprogramNetwork) {