Change #include style

Header files are now always included with their path from the
project's root directory rather than the path relative to
the includer.

Change-Id: If39b8510eef8da00baf5fe88337c45dbdf8c766e
Refs: #3084
diff --git a/tests/unit/security/pib/pib-data-fixture.hpp b/tests/unit/security/pib/pib-data-fixture.hpp
index 2328702..21af850 100644
--- a/tests/unit/security/pib/pib-data-fixture.hpp
+++ b/tests/unit/security/pib/pib-data-fixture.hpp
@@ -19,12 +19,10 @@
  * See AUTHORS.md for complete list of ndn-cxx authors and contributors.
  */
 
-#ifndef NDN_TESTS_SECURITY_PIB_DATA_FIXTURE_HPP
-#define NDN_TESTS_SECURITY_PIB_DATA_FIXTURE_HPP
+#ifndef NDN_TESTS_UNIT_SECURITY_PIB_DATA_FIXTURE_HPP
+#define NDN_TESTS_UNIT_SECURITY_PIB_DATA_FIXTURE_HPP
 
-#include "security/v2/certificate.hpp"
-
-#include "boost-test.hpp"
+#include "ndn-cxx/security/v2/certificate.hpp"
 
 namespace ndn {
 namespace security {
@@ -63,4 +61,4 @@
 } // namespace security
 } // namespace ndn
 
-#endif // NDN_TESTS_SECURITY_PIB_DATA_FIXTURE_HPP
+#endif // NDN_TESTS_UNIT_SECURITY_PIB_DATA_FIXTURE_HPP