Fix up sort_vcf to run in docker mode.  revert defray option from vg filter until container fixed.
Fix up sort_vcf to run in docker mode.  revert defray option from vg filter until container fixed.

vgteam/toil-vg,glennhickey/toil-vg,glennhickey/toil-vg,vgteam/toil-vg