don't use /var/tmp by default for the tmp_dir.
don't use /var/tmp by default for the tmp_dir.

EichlerLab/pacbio_variant_caller,EichlerLab/pacbio_variant_caller,EichlerLab/pacbio_variant_caller,EichlerLab/pacbio_variant_caller,EichlerLab/pacbio_variant_caller