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/websocket-transport-fixture.hpp b/tests/daemon/face/websocket-transport-fixture.hpp
index 38ab81c..8b8ee42 100644
--- a/tests/daemon/face/websocket-transport-fixture.hpp
+++ b/tests/daemon/face/websocket-transport-fixture.hpp
@@ -29,8 +29,9 @@
 #include "face/websocket-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 {
@@ -41,7 +42,7 @@
 
 /** \brief a fixture that accepts a single WebSocket connection from a client
  */
-class WebSocketTransportFixture : public BaseFixture
+class WebSocketTransportFixture : public GlobalIoFixture
 {
 protected:
   WebSocketTransportFixture()