softmax with opset8 is not supported about openvino_contrib

[alex-ht]

I found a workaround!
The original xml has a version="opset8" attribute and <data axis="-1"/>like this

<layer id="190" name="conv2d_25/truediv:0" type="SoftMax" version="opset8">
			<data axis="-1"/>
			<rt_info>
				<attribute name="fused_names" version="0" value="conv2d_25/truediv:0"/>
			</rt_info>
			<input>
				<port id="0" precision="FP32">
					<dim>1</dim>
					<dim>16</dim>
					<dim>16</dim>
					<dim>2</dim>
				</port>
			</input>
			<output>
				<port id="1" precision="FP32" names="conv2d_25/truediv:0">
					<dim>1</dim>
					<dim>16</dim>
					<dim>16</dim>
					<dim>2</dim>
				</port>
			</output>
		</layer>

change it to "opset1" and give axis a positive index value...

<layer id="190" name="conv2d_25/truediv:0" type="SoftMax" version="opset1">
                        <data axis="3"/>