Disable user commands light test on macOS (#1204)

Signed-off-by: Louise Poubel <[email protected]>

Author: chapulina

test/integration/user_commands.cc

@@ -24,6 +24,7 @@
 #include <ignition/common/Util.hh>
 #include <ignition/math/Pose3.hh>
 #include <ignition/transport/Node.hh>
+#include <ignition/utilities/ExtraTestMacros.hh>
 
 #include "ignition/gazebo/components/Light.hh"
 #include "ignition/gazebo/components/Link.hh"
@@ -690,7 +691,8 @@ TEST_F(UserCommandsTest, Pose)
 }
 
 /////////////////////////////////////////////////
-TEST_F(UserCommandsTest, Light)
+// https://github.com/ignitionrobotics/ign-gazebo/issues/634
+TEST_F(UserCommandsTest, IGN_UTILS_TEST_DISABLED_ON_MAC(Light))
 {
   // Start server
   ServerConfig serverConfig;