Update quantize test to use narrow_range

Author: jignparm

tests/test_backend.py

@@ -1934,7 +1934,7 @@ def test_qdq_signed_input(self):
         x_shape = [3, 3, 2]
         x_val = np.arange(-np.prod(x_shape)/2, np.prod(x_shape)/2).astype("float32").reshape(x_shape)
         def func(x):
-            x_ = quantize_and_dequantize(x, -6.0, 6.0, signed_input=True, narrow_range=True, range_given=True)
+            x_ = quantize_and_dequantize(x, -6.0, 6.0, signed_input=True, narrow_range=False, range_given=True)
             return tf.identity(x_, name=_TFOUTPUT)
         _ = self._run_test_case(func, [_OUTPUT], {_INPUT: x_val})