Comment 0 for bug 1407162

Following PEP8/Flake8 check should be enabled to make core more clean and readable and consistent with OpenStack Hacking rules:
E265: block comment should start with '# ' - makes code more readable
H302: import only modules - OpenStack coding guidelines
H405: multi line docstring summary not separated with an empty line - OpenStack coding guidelines
H803: git commit title should not end with period - will make commit messages more standardized