[Fix] Attribute snake case

Fix #234 (closed)

• Add unit test for checking attributes name consistency.
• Add attributesName function (C++/Python) to retrieve attribute name of an operator.
• Attribute name changed:
  • Resize
    • "coordinateTransformationMode" -> "coordinate_transformation_mode"
    • "cubicCoeffA" -> "cubic_coeff_a"
    • "InterpolationMode" -> "interpolation_mode"
    • "PaddingMode" -> "padding_mode"
  • Unsqueeze
    • "Axes" -> "axes"
  • Squeeze
    • "Axes -> "axes"
  • ConstantOfShape
    • "Value" -> "value"
  • BitShift
    • "BitShiftdirection" -> "bit_shift_direction"