[Documentation proposal] Running test and code linting

[peppelinux]

I executed the tests in the current master branch.
I propose to add a requirements file because I had to install the following dependencies to get test running:

pip install pymongo mock responses

I also have to report my result:
6 failed, 666 passed, 3 skipped, 744 warnings in 50.99 seconds

About the code linting with flake8, I got 4163 alerts. I also didn't find any flake init file.

[c00kiemon5ter]

Hi @peppelinux

The tests/ folder contains test-requirements.txt.

Tests run on every PR and commit on travis-ci. See the travis and tox configurations.

Regarding flake8, it is not as easy as it seems. We cannot just go through the whole codebase and change the formatting. It has to be done incrementally.
You can see some flake8-specific options in setup.cfg

[peppelinux]

Thank you very much