tests: Enable isolation of KeyChain during run of unit/integrated tests

Change-Id: Ia136e4bb074c14e8d824f563594cbc0ad7592c3b
Refs: #3655
diff --git a/tests/unit-tests/identity-management-time-fixture.cpp b/tests/unit-tests/identity-management-time-fixture.cpp
index ebf14a1..f029fc4 100644
--- a/tests/unit-tests/identity-management-time-fixture.cpp
+++ b/tests/unit-tests/identity-management-time-fixture.cpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /**
- * Copyright (c) 2013-2015 Regents of the University of California.
+ * Copyright (c) 2013-2016 Regents of the University of California.
  *
  * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
  *
@@ -22,7 +22,7 @@
 #include "identity-management-time-fixture.hpp"
 
 namespace ndn {
-namespace security {
+namespace tests {
 
 IdentityManagementTimeFixture::IdentityManagementTimeFixture()
 {
@@ -32,5 +32,5 @@
 {
 }
 
-} // namespace security
+} // namespace tests
 } // namespace ndn