gnocchiclient 7.0.6

gnocchiclient 7.0.4

Remove deprecated cli options

FIX Bug on workaround missing OS_AUTH_TYPE

os.environ.set doesn't existe, must use os.environ["OS_AUTH_TYPE"] = 
for setting environnement variable
https://docs.python.org/2/library/os.html

fix pep8

ignore W504[1]. tbh, not what i prefer.

[1] https://github.com/PyCQA/pycodestyle/issues/197

pep8: enable logging format checks

pep8: fix RST304 errors

  * Using Python 3 for building the doc.

gnocchiclient 7.0.2

Remove hacking dependency for pep8

Hacking is not maintained and depends on an old flake8 version.
Switch to flake8 and a few standard extensions.

tests: remove testtools and fixtures dependencies

Support Python 3.7 instead of 3.5