update tests/st/ops/gpu/test_tensoradd.py.

fix pytest.mark for testcase

tests/st/ops/gpu/test_tensoradd.py

@@ -25,10 +25,6 @@ from mindspore.common.parameter import Parameter
 
 context.set_context(device_target='GPU')
 
-
-@pytest.mark.level0
-@pytest.mark.platform_x86_gpu_training
-@pytest.mark.env_onecard
 class TensroAdd(nn.Cell):
     def __init__(self):
         super(TensroAdd, self).__init__()
@@ -61,7 +57,9 @@ class TensroAdd(nn.Cell):
             self.add(self.x, self.y), self.add(self.x1, self.y1), self.add(self.x2, self.y2),
             self.add(self.x3, self.y3))
 
-
+@pytest.mark.level0
+@pytest.mark.platform_x86_gpu_training
+@pytest.mark.env_onecard
 def test_TensroAdd():
     add = TensroAdd()
     output = add()