DelayAndBandPassKernel: add bandPassScale parameter
This allows the BeamFormerPreprocessingStep to enable bandPass correction in the DelayAndBandPassKernel directly, rather than in the BandPassCorrectionKernel.
This allows the BeamFormerPreprocessingStep to enable bandPass correction in the DelayAndBandPassKernel directly, rather than in the BandPassCorrectionKernel.