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/table/name-tree.t.cpp b/tests/daemon/table/name-tree.t.cpp
index 458d7e3..4e325bc 100644
--- a/tests/daemon/table/name-tree.t.cpp
+++ b/tests/daemon/table/name-tree.t.cpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /*
- * Copyright (c) 2014-2018,  Regents of the University of California,
+ * Copyright (c) 2014-2019,  Regents of the University of California,
  *                           Arizona Board of Regents,
  *                           Colorado State University,
  *                           University Pierre & Marie Curie, Sorbonne University,
@@ -26,6 +26,7 @@
 #include "table/name-tree.hpp"
 
 #include "tests/test-common.hpp"
+#include "tests/daemon/global-io-fixture.hpp"
 
 namespace nfd {
 namespace name_tree {
@@ -34,7 +35,7 @@
 using namespace nfd::tests;
 
 BOOST_AUTO_TEST_SUITE(Table)
-BOOST_FIXTURE_TEST_SUITE(TestNameTree, BaseFixture)
+BOOST_FIXTURE_TEST_SUITE(TestNameTree, GlobalIoFixture)
 
 BOOST_AUTO_TEST_CASE(ComputeHash)
 {
@@ -458,7 +459,7 @@
   std::unordered_set<Name> m_names;
 };
 
-class EnumerationFixture : public BaseFixture
+class EnumerationFixture : public GlobalIoFixture
 {
 protected:
   EnumerationFixture()