change test_scheduler.py tests back as it was

aidge_backend_cpu/unit_tests/test_scheduler.py

@@ -16,6 +16,7 @@ class test_scheduler(unittest.TestCase):
 
         t = aidge_core.Tensor(np.arange(6, dtype=np.int32) - 3)
 
+        input_node = aidge_core.Producer(t)
         relu = aidge_core.ReLU()
         input_node.add_child(relu)
 
@@ -29,7 +30,7 @@ class test_scheduler(unittest.TestCase):
 
         scheduler = aidge_core.SequentialScheduler(gv)
 
-        scheduler.forward(data=[t])
+        scheduler.forward()
 
         out_tensor = relu.get_operator().get_output(0)
         expected_out = [0,0,0,0,1,2]