bfTvOverlapSaveConvolutionImageFilter fails randomly

The test bfTvOverlapSaveConvolutionImageFilter fails randomly (on both megatron and new CI). Looking at the history, it only fails on Windows x86 builds.

The error message from ITK:

otbTestMain 'otbOverlapSaveConvolutionImageFilter': exception caught:
..\xdk\include\ITK-4.13\itkFFTWCommon.h:555:
itk::ERROR: PLAN_CREATION_FAILED