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/core/rtt-estimator.t.cpp b/tests/core/rtt-estimator.t.cpp
index e5952e9..526b03d 100644
--- a/tests/core/rtt-estimator.t.cpp
+++ b/tests/core/rtt-estimator.t.cpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
-/**
- * Copyright (c) 2014-2017,  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,
@@ -30,9 +30,9 @@
 namespace nfd {
 namespace tests {
 
-BOOST_FIXTURE_TEST_SUITE(TestRttEstimator, BaseFixture)
+BOOST_AUTO_TEST_SUITE(TestRttEstimator)
 
-static inline double
+static double
 computeRtoAsFloatSeconds(RttEstimator& rtt)
 {
   typedef time::duration<double, time::seconds::period> FloatSeconds;