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/daemon/face/unicast-udp-transport-fixture.hpp b/tests/daemon/face/unicast-udp-transport-fixture.hpp
index b269a71..08acd46 100644
--- a/tests/daemon/face/unicast-udp-transport-fixture.hpp
+++ b/tests/daemon/face/unicast-udp-transport-fixture.hpp
@@ -29,8 +29,9 @@
 #include "face/unicast-udp-transport.hpp"
 #include "face/face.hpp"
 
-#include "dummy-receive-link-service.hpp"
+#include "tests/test-common.hpp"
 #include "tests/daemon/limited-io.hpp"
+#include "dummy-receive-link-service.hpp"
 
 namespace nfd {
 namespace face {
@@ -40,7 +41,7 @@
 namespace ip = boost::asio::ip;
 using ip::udp;
 
-class UnicastUdpTransportFixture : public BaseFixture
+class UnicastUdpTransportFixture : public GlobalIoFixture
 {
 protected:
   UnicastUdpTransportFixture()