Retrieve fastq files corresponding to the sample and read number.

def _get_fastq_files(ldetail, read, fastq_dir):
    """Retrieve fastq files corresponding to the sample and read number.
    """
    return glob.glob(os.path.join(fastq_dir, "Project_%s" % ldetail["project_name"],
                                  "Sample_%s" % ldetail["name"],
                                  "%s_*_%s_*.fastq.gz" % (ldetail["name"], read)))