util+tests: fix copyright notices in files copied from NFD

Change-Id: I43fd6a6085cd5ffe99676e20d1cf55400577bdb7
diff --git a/tests/unit-tests/util/notification-subscriber.t.cpp b/tests/unit-tests/util/notification-subscriber.t.cpp
index 5b22e48..e7144e9 100644
--- a/tests/unit-tests/util/notification-subscriber.t.cpp
+++ b/tests/unit-tests/util/notification-subscriber.t.cpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /**
- * Copyright (c) 2013-2017 Regents of the University of California,
+ * Copyright (c) 2014-2017 Regents of the University of California,
  *                         Arizona Board of Regents,
  *                         Colorado State University,
  *                         University Pierre & Marie Curie, Sorbonne University,