Rearchitect providers

enoslib/infra/__init__.py

enoslib/infra/enos_g5k/__init__.py

enoslib/infra/enos_g5k/api.py

enoslib/infra/enos_g5k/error.py

enoslib/infra/enos_g5k/provider.py

enoslib/infra/enos_g5k/remote.py

enoslib/infra/enos_g5k/schema.py

enoslib/infra/enos_g5k/utils.py

enoslib/infra/enos_vagrant/Vagrantfile.j2

enoslib/infra/enos_vagrant/__init__.py

enoslib/infra/enos_vagrant/provider.py

enoslib/infra/provider.py

setup.py

tests/functionnal/test_g5k.py

tests/functionnal/test_vagrant.py

tests/unit/infra/enos_g5k/__init__.py

tests/unit/infra/enos_g5k/test_api.py

tests/unit/infra/enos_g5k/test_utils.py