Update the NDNCERT library to version NDNCERT v2

spec:[https://github.com/named-data/ndncert/wiki/NDNCERT-Protocol-new]

Change-Id: Ia480a8e70c4b38ca170dfe2fcf50d1265ab65f46
diff --git a/src/client-config.cpp b/src/client-config.cpp
index e28407c..47b75da 100644
--- a/src/client-config.cpp
+++ b/src/client-config.cpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /**
- * Copyright (c) 2017-2018, Regents of the University of California.
+ * Copyright (c) 2017-2019, Regents of the University of California.
  *
  * This file is part of ndncert, a certificate management system based on NDN.
  *
@@ -61,19 +61,9 @@
   ClientCaItem item;
   item.m_caName = Name(configSection.get<std::string>("ca-prefix"));
   item.m_caInfo = configSection.get<std::string>("ca-info");
-  item.m_probe = configSection.get("probe", "");
-  std::string listEnabledField = configSection.get("is-list-enabled", "false");
-  if (listEnabledField == "true") {
-    item.m_isListEnabled = true;
-  }
-  else {
-    item.m_isListEnabled = false;
-  }
-  item.m_targetedList = configSection.get("target-list", "");
-
+  item.m_probe = configSection.get<std::string>("probe");
   std::istringstream ss(configSection.get<std::string>("certificate"));
   item.m_anchor = *(io::load<security::v2::Certificate>(ss));
-
   return item;
 }