build: Upgrade waf to version 2.0.6

This commit also includes:
- cleanup of build scripts
- replacing log4cxx with ndn-cxx logging facility

Change-Id: I96fd673a3cd2e06061e9efc1a7891e41cf97ea4f
diff --git a/tests/unit/validator/certificate-fetcher-ndns-app-cert.cpp b/tests/unit/validator/certificate-fetcher-ndns-app-cert.cpp
index 2efe67c..3f236aa 100644
--- a/tests/unit/validator/certificate-fetcher-ndns-app-cert.cpp
+++ b/tests/unit/validator/certificate-fetcher-ndns-app-cert.cpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
-/**
- * Copyright (c) 2014-2017, Regents of the University of California.
+/*
+ * Copyright (c) 2014-2018, Regents of the University of California.
  *
  * This file is part of NDNS (Named Data Networking Domain Name Service).
  * See AUTHORS.md for complete list of NDNS authors and contributors.
@@ -36,8 +36,6 @@
 namespace ndns {
 namespace tests {
 
-NDNS_LOG_INIT("AppCertFetcher")
-
 BOOST_AUTO_TEST_SUITE(AppCertFetcher)
 
 unique_ptr<security::v2::Validator>