auto_scan_test_unary_ops & Elu

[qqj1130247885]

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下面的文字请保留在PR说明的最后面，并在提完PR后，根据实际情况勾选确认以下情况

Please check the follow step before merging this pull request

• [x] Python code style verification
• [x] Review all the code diff by yourself
• [ ] All models(TensorFLow/Caffe/ONNX/PyTorch) testing passed
• [ ] Details about your pull request, releated issues

If this PR add new model support, please update model_zoo.md and add model to out test model zoos(@wjj19950828)

• [ ] New Model Supported
• [ ] No New Model Supported

主要贡献

1 tests/onnx下 增加了针对一元输入，且输入对象为float32类型的OP的单测程序。 包括： "Cos", "Atan", "Asinh", "Asin","Acosh","Acos", "Cosh", "Exp","Floor", "Tan", "Erf","Sin", "Sinh", "Tanh", "Atanh", "Sign"。 2 op_mapper增加了对若干OP 的map。 3 tests/onnx下,增加了对Elu的单测程序

[wjj19950828]

文件名改一下，unary