tests: IdentityManagementFixture no longer derives from BaseFixture

Also rename it to KeyChainFixture

Refs: #4528
Change-Id: Id86f4affc9c4c9ae159912430cc3e78557bf1ac2
diff --git a/tests/daemon/mgmt/rib-manager-sl-announce.t.cpp b/tests/daemon/mgmt/rib-manager-sl-announce.t.cpp
index ea3ca10..6310ced 100644
--- a/tests/daemon/mgmt/rib-manager-sl-announce.t.cpp
+++ b/tests/daemon/mgmt/rib-manager-sl-announce.t.cpp
@@ -26,7 +26,7 @@
 #include "mgmt/rib-manager.hpp"
 #include "rib/fib-updater.hpp"
 
-#include "tests/identity-management-fixture.hpp"
+#include "tests/key-chain-fixture.hpp"
 
 #include <ndn-cxx/util/dummy-client-face.hpp>
 
@@ -35,7 +35,7 @@
 
 using rib::Route;
 
-class RibManagerSlAnnounceFixture : public IdentityManagementTimeFixture
+class RibManagerSlAnnounceFixture : public UnitTestTimeFixture, public KeyChainFixture
 {
 public:
   using SlAnnounceResult = RibManager::SlAnnounceResult;