tests: Implement IdentityManagementV2Fixture for v2::KeyChain

The old IdentityManagementFixture is renamed to IdentityManagementV1Fixture.

This commit also removes global KeyChainFixture, as it doesn't work with
TestKeyChain test suites.  Instead, IdentityManagementFixtures are
customizing PIB/TPM modules.

Change-Id: Iadc43b78523cd43bff4f454d6aea2fca8107a650
Refs: #2926
diff --git a/tests/unit-tests/security/sec-rule-relative.t.cpp b/tests/unit-tests/security/sec-rule-relative.t.cpp
index 21f805e..4209f28 100644
--- a/tests/unit-tests/security/sec-rule-relative.t.cpp
+++ b/tests/unit-tests/security/sec-rule-relative.t.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).
  *
@@ -34,9 +34,9 @@
 BOOST_AUTO_TEST_CASE(Basic)
 {
   Name rsaIdentity("/SecurityTestSecRule/Basic/Rsa");
-  BOOST_REQUIRE(addIdentity(rsaIdentity, RsaKeyParams()));
+  addIdentity(rsaIdentity, RsaKeyParams());
   Name ecdsaIdentity("/SecurityTestSecRule/Basic/Ecdsa");
-  BOOST_REQUIRE(addIdentity(ecdsaIdentity, EcdsaKeyParams()));
+  addIdentity(ecdsaIdentity, EcdsaKeyParams());
 
   Name dataName("SecurityTestSecRule/Basic");
   Data rsaData(dataName);