Assembly flag needs to be added to a simple command when input file is in hg37 already

[Jahysama]

Simple command when input file is in hg37 already and removing imputation, phasing and imputation is not required:

docker run --rm --privileged -it -v /media:/media -v /etc/localtime:/etc/localtime:ro genx_relatives:latest \
launcher.py preprocess --ref-directory /media/ref --vcf-file /media/input.vcf.gz --directory /media/pipeline_data/real-data --assembly hg37