security: Renaming EcdsaKeyParams to EcKeyParams

Change-Id: If27faf095474f5be3f8f454925b389b97bf4425d
Refs: #3135
diff --git a/src/security/v1/certificate.cpp b/src/security/v1/certificate.cpp
index 823c994..d686a50 100644
--- a/src/security/v1/certificate.cpp
+++ b/src/security/v1/certificate.cpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /**
- * Copyright (c) 2013-2016 Regents of the University of California.
+ * Copyright (c) 2013-2017 Regents of the University of California.
  *
  * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
  *
@@ -288,7 +288,7 @@
     os << "(RSA)";
     break;
   case KeyType::EC:
-    os << "(ECDSA)";
+    os << "(EC)";
     break;
   default:
     os << "(Unknown key type)";