test-runner: Replace initialization by global fixture

This is required to even be able to build tests static
for Windows.

test/test-runner.cpp

@@ -17,18 +17,17 @@
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.             *
 ******************************************************************************/
 
+#define BOOST_TEST_MAIN
+
 #include "icinga/icingaapplication.hpp"
 #include "base/application.hpp"
 #include <BoostTestTargetConfig.h>
 
 using namespace icinga;
 
-static bool init_unit_test()
+struct TestIcingaApplication
 {
-	return true;
+	TestIcingaApplication()
-}
-
-int main(int argc, char *argv[])
 	{
 		Application::InitializeBase();
 
@@ -36,10 +35,12 @@ int main(int argc, char *argv[])
 
 		appInst = new IcingaApplication();
 		static_pointer_cast<ConfigObject>(appInst)->OnConfigLoaded();
-
-	int rc = boost::unit_test::unit_test_main(&init_unit_test, argc, argv);
-
-	appInst.reset();
-
-	Application::Exit(rc);
 	}
+
+	~TestIcingaApplication()
+	{
+		IcingaApplication::GetInstance().reset();
+	}
+};
+
+BOOST_GLOBAL_FIXTURE(TestIcingaApplication);