[TMP] change scheduler test for Merge to be possible

aidge_backend_cpu/unit_tests/test_scheduler.py

@@ -17,9 +17,12 @@ class test_scheduler(unittest.TestCase):
         t = aidge_core.Tensor(np.arange(6, dtype=np.int32) - 3)
 
         relu = aidge_core.ReLU()
+        input_node.add_child(relu)
 
         gv = aidge_core.GraphView()
         gv.add(relu)
+        gv.add(input_node)
+
 
         gv.set_datatype(aidge_core.dtype.int32)
         gv.set_backend("cpu")