pep8 --> pycodestyle

https://pep8.readthedocs.io/en/release-1.7.x/

Author: cclauss

.travis.yml

@@ -13,7 +13,7 @@ script:
   - 'coverage run --source=src/onelogin/saml2 --rcfile=tests/coverage.rc setup.py test'
   - 'coverage report -m --rcfile=tests/coverage.rc'
 # - 'pylint src/onelogin/saml2 --rcfile=tests/pylint.rc'
-  - 'pep8 tests/src/OneLogin/saml2_tests/*.py demo-flask/*.py demo-django/*.py src/onelogin/saml2/*.py --config=tests/pep8.rc'
+  - 'pycodestyle tests/src/OneLogin/saml2_tests/*.py demo-flask/*.py demo-django/*.py src/onelogin/saml2/*.py --config=tests/pep8.rc'
   - 'pyflakes src/onelogin/saml2 demo-django demo-flask tests/src/OneLogin/saml2_tests'
 
 after_success: 'coveralls'