security: Construct KeyChain from configuration file.

Change-Id: Iaddac24e2c4e199fdde83fa1d0067a87e18729c4
Refs: #1532
diff --git a/tests/security/test-validator.cpp b/tests/security/test-validator.cpp
index 219fbc4..47ab79a 100644
--- a/tests/security/test-validator.cpp
+++ b/tests/security/test-validator.cpp
@@ -32,9 +32,10 @@
   BOOST_CHECK(false);
 }
 
-BOOST_AUTO_TEST_CASE (Null)
+BOOST_AUTO_TEST_CASE(Null)
 {
-  KeyChainImpl<SecPublicInfoSqlite3, SecTpmFile> keyChain;
+  BOOST_REQUIRE_NO_THROW(KeyChain("sqlite3", "file"));
+  KeyChain keyChain("sqlite3", "file");
 
   Name identity("/TestValidator/Null");
   identity.appendVersion();