fix test

Author: wweic

tests/python/relay/test_adt.py

@@ -738,11 +738,11 @@ def run(dtype):
     run('int32')
 
 def vmobj_to_list(o):
-    if isinstance(o, tvm.relay.backend.vmobj.TensorObject):
+    if isinstance(o, tvm.relay.backend.vmobj.Tensor):
         return [o.asnumpy().tolist()]
     elif isinstance(o, tvm.relay.backend.interpreter.TensorValue):
         return [o.asnumpy()]
-    elif isinstance(o, tvm.relay.backend.vmobj.DatatypeObject):
+    elif isinstance(o, tvm.relay.backend.vmobj.Datatype):
         result = []
         for f in o:
             result.extend(vmobj_to_list(f))