Included acmg verdict in annotated vcf

[ckopanos]

Code changes required to

1. Support for python versions > 3.6
2. Include the acmg verdict by default when annotating a vcf
3. Fix issues with the vcf annotator not correctly storing the alternate sequence
4. Fix issues when the api responds with an error code on batch requests
5. Formatting changes

[argyris-gardelakos]

The only thing that is failing for me on staging server is when I am running the varsome_api_annotate_vcf.py i get the following error (python 3.8) @ckopanos do you think it is something on my end?

Traceback (most recent call last):
  File "/usr/local/bin/varsome_api_annotate_vcf.py", line 7, in <module>
    exec(compile(f.read(), __file__, 'exec'))
  File "/home/gardelakosa/repos/varsome-api-client-python/scripts/varsome_api_annotate_vcf.py", line 19, in <module>
    from varsome_api.vcf import VCFAnnotator
  File "/home/gardelakosa/repos/varsome-api-client-python/varsome_api/vcf.py", line 20, in <module>
    from vcf.parser import _Info, _encode_type
ImportError: cannot import name '_encode_type' from 'vcf.parser' (/usr/local/lib/python3.8/dist-packages/vcf/parser.py)

[argyris-gardelakos]

Seems good to me. Tested on prod and staging as I don't have Token in stable-api (pending from Yolanda)

[kchatzikok]

Should the second parameter change from '.' to 1? If yes ignore my comment. If no, there are other places in the code that this has changed