Add noexcept in DataIter, InputSplit #506
Merged
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This PR is created in addition to apache/mxnet#14223 and dmlc/mshadow#369 to address memory issues in mxnet exit.
When TensorContainer's destructor becomes noexcept(false), classes that reference it also become noexcept(false) implicitly in destruction.
If inherited class's destructor is noexcept(false) and its base class has a virtual destructor, then base class's destructor should also be added noexcept(false) to successfully compile.