tests: unit-tests-{core,tools} no longer require a global io_service

BaseFixture is moved to tests/daemon and renamed to GlobalIoFixture

Refs: #4528
Change-Id: If9184e9f7f1d6072b0103d3ea3ca6c31a9e505c8
diff --git a/tests/key-chain-fixture.hpp b/tests/key-chain-fixture.hpp
index 810dab8..18ba4fc 100644
--- a/tests/key-chain-fixture.hpp
+++ b/tests/key-chain-fixture.hpp
@@ -26,7 +26,7 @@
 #ifndef NFD_TESTS_KEY_CHAIN_FIXTURE_HPP
 #define NFD_TESTS_KEY_CHAIN_FIXTURE_HPP
 
-#include "tests/test-common.hpp"
+#include "core/common.hpp"
 
 #include <ndn-cxx/security/key-chain.hpp>