removed multithreading, because vcflib compilation breaks sometimes
removed multithreading, because vcflib compilation breaks sometimes

MonashBioinformaticsPlatform/bio-ansible,MonashBioinformaticsPlatform/bio-ansible,MonashBioinformaticsPlatform/bio-ansible,MonashBioinformaticsPlatform/bio-ansible,MonashBioinformaticsPlatform/bio-ansible