Merge branch 'issue/634' into 'master'

SCRUM#634: Atualiza linter requirements

See merge request !73

py_linter_requirements.txt

-flake8
-mccabe
-pycodestyle==2.3.1
-pyflakes
-flake8-colors
+flake8==3.6.0
+mccabe==0.6.1
+pycodestyle==2.4.0
+pyflakes==2.0.0
+flake8-colors==0.1.6