Switched frip calculation to single thread

    if first_line is not None:

        print("Calculating " + bam_file + " using " + peak_file_list[idx])

        cr = crpb.CountReadsPerBin([bam_file], bedFile=[peak_file_list[idx]], numberOfProcessors=int(args.threads))

        cr = crpb.CountReadsPerBin([bam_file], bedFile=[peak_file_list[idx]], numberOfProcessors=int(1))

        # Calc the total number of reads in peaks per bam file

        reads_at_peaks = cr.run()

process CALCULATE_FRIP {

    tag "$meta.id"

    label 'process_high'

    label 'process_low'

    conda (params.enable_conda ? "conda-forge::python=3.8.3 bioconda::deeptools=3.5.* bioconda::pysam=0.17.*" : null)

    container "chrischeshire/nfcore-cutandrun:latest"