Replace std::function<TensorRow(TensorRow)> with std::function<MSTensorVec(MSTensor)> by using std::bind
Replace pad_info with MSTensor
Switch TensorShape/dataset::DataType to vector<int64> /mindspore::DataType
Change TypeId to mindspore::DataType in SchemaObj
address review cmts, add CreateFromMSTensor() in tensor.h/.cc