core: rename nfd::EventId to nfd::scheduler::EventId

refs #2298

Change-Id: I5d4f4c5234fd370666e81a8a8e7d312694a6ad5d
diff --git a/rib/face-entry.hpp b/rib/face-entry.hpp
index c9eeb33..a6d468d 100644
--- a/rib/face-entry.hpp
+++ b/rib/face-entry.hpp
@@ -1,12 +1,12 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /**
- * Copyright (c) 2014,  Regents of the University of California,
- *                      Arizona Board of Regents,
- *                      Colorado State University,
- *                      University Pierre & Marie Curie, Sorbonne University,
- *                      Washington University in St. Louis,
- *                      Beijing Institute of Technology,
- *                      The University of Memphis
+ * Copyright (c) 2014-2015,  Regents of the University of California,
+ *                           Arizona Board of Regents,
+ *                           Colorado State University,
+ *                           University Pierre & Marie Curie, Sorbonne University,
+ *                           Washington University in St. Louis,
+ *                           Beijing Institute of Technology,
+ *                           The University of Memphis.
  *
  * This file is part of NFD (Named Data Networking Forwarding Daemon).
  * See AUTHORS.md for complete list of NFD authors and contributors.
@@ -50,12 +50,12 @@
 
 public:
   void
-  setExpirationEvent(const EventId eid)
+  setExpirationEvent(const scheduler::EventId eid)
   {
     m_expirationEvent = eid;
   }
 
-  const EventId&
+  const scheduler::EventId&
   getExpirationEvent() const
   {
     return m_expirationEvent;
@@ -69,7 +69,7 @@
   time::steady_clock::TimePoint expires;
 
 private:
-  EventId m_expirationEvent;
+  scheduler::EventId m_expirationEvent;
 };
 
 inline bool