Updating ca storage interface to support listing function

Change-Id: Iab9d50d075a139a671d94824b97c78b741203354
Refs:#4048
diff --git a/tests/unit-tests/ca-module.t.cpp b/tests/unit-tests/ca-module.t.cpp
index 33c81ee..0142755 100644
--- a/tests/unit-tests/ca-module.t.cpp
+++ b/tests/unit-tests/ca-module.t.cpp
@@ -18,7 +18,7 @@
  * See AUTHORS.md for complete list of ndncert authors and contributors.
  */
 
-#include "identity-management-fixture.hpp"
+#include "database-fixture.hpp"
 #include "ca-module.hpp"
 #include "client-module.hpp"
 #include "challenge-module.hpp"
@@ -31,7 +31,7 @@
 namespace ndncert {
 namespace tests {
 
-BOOST_FIXTURE_TEST_SUITE(TestCaModule, IdentityManagementV2TimeFixture)
+BOOST_FIXTURE_TEST_SUITE(TestCaModule, DatabaseFixture)
 
 BOOST_AUTO_TEST_CASE(Initialization)
 {