refactor each requirement into a file

mc_openapi/__init__.py

mc_openapi/doml_mc/builtin_requirements/__init__.py

...ml_mc/builtin_requirements/all_concrete_maps_something.py

...ltin_requirements/all_infrastructure_elements_deployed.py

.../builtin_requirements/all_software_components_deployed.py

mc_openapi/doml_mc/builtin_requirements/iface_uniq.py

...mc/builtin_requirements/security_group_must_have_iface.py

...oml_mc/builtin_requirements/software_package_iface_net.py

mc_openapi/doml_mc/builtin_requirements/vm_has_iface.py

mc_openapi/doml_mc/common_reqs.py

mc_openapi/doml_mc/imc.py

requirements.txt

tests/test_modelchecker.py