Added some tests for model cards + fixed some model card errors · sassoftware/python-sasctl@3913c30

The job was canceled because "_3_7_ubuntu-20_04" failed.

InvocationError for command /home/runner/work/python-sasctl/python-sasctl/.tox/py36-tests-unit/bin/pytest --cov=/home/runner/work/python-sasctl/python-sasctl/.tox/py36-tests-unit/lib/python3.6/site-packages/sasctl --cov-report=xml:./.reports/unit.xml --cov-append tests/unit/ (exited with code 1)