rib: Request Face create/destroy notification as early as possible

This commit does not completely solve the problem, as depending on
ContentStore size and amount of updates, some notification still can be
missed.  However, this commit reduces chances for this to happen.

Change-Id: I5456667c1fba1031146b379195de852f1561fd5d
Refs: #1742

rib/rib-manager.cpp

@@ -26,6 +26,7 @@
 #include "rib-manager.hpp"
 #include "core/global-io.hpp"
 #include "core/logger.hpp"
+#include "core/scheduler.hpp"
 
 namespace nfd {
 namespace rib {
@@ -532,12 +533,20 @@ RibManager::onNotification(const FaceEventNotification& notification)
   NFD_LOG_TRACE("onNotification: " << notification);
   if (notification.getKind() == ndn::nfd::FACE_EVENT_DESTROYED) //face destroyed
     {
-      m_managedRib.erase(notification.getFaceId());
-
-      sendUpdatesToFibAfterFaceDestroyEvent();
+      scheduler::schedule(time::seconds(0),
+                          bind(&RibManager::processErasureAfterNotification, this,
+                               notification.getFaceId()));
     }
 }
 
+void
+RibManager::processErasureAfterNotification(uint64_t faceId)
+{
+  m_managedRib.erase(faceId);
+
+  sendUpdatesToFibAfterFaceDestroyEvent();
+}
+
 void
 RibManager::sendUpdatesToFib(const shared_ptr<const Interest>& request,
                              const ControlParameters& parameters)

rib/rib-manager.hpp

@@ -176,6 +176,9 @@ private:
   void
   onNotification(const FaceEventNotification& notification);
 
+  void
+  processErasureAfterNotification(uint64_t faceId);
+
   void
   sendUpdatesToFib(const shared_ptr<const Interest>& request,
                    const ControlParameters& parameters);