Allow running abao from tox

[teferi]

Simply run tox -e abao to test raml files against fake api.

[coveralls]

Coverage remained the same at 95.288% when pulling df8e277 on run_abao_from_tox into b81830c on master.

[coveralls]

Coverage increased (+0.3%) to 95.55% when pulling eff2a16 on run_abao_from_tox into b81830c on master.

[coveralls]

Coverage decreased (-0.3%) to 95.026% when pulling 019ba57 on run_abao_from_tox into b81830c on master.

[coveralls]

Coverage remained the same at 95.288% when pulling 794b393 on run_abao_from_tox into b81830c on master.

[coveralls]

Coverage increased (+0.3%) to 95.55% when pulling f34c26a on run_abao_from_tox into b81830c on master.

[coveralls]

Coverage remained the same at 95.288% when pulling 62ad375 on run_abao_from_tox into b81830c on master.

[coveralls]

Coverage increased (+0.3%) to 95.55% when pulling fa33498 on run_abao_from_tox into b81830c on master.

[coveralls]

Coverage decreased (-0.4%) to 94.9% when pulling 1e4ca9e on run_abao_from_tox into e0f41c1 on master.