Use flake8 and hacking instead of pep8 for Python syntax checks
Use flake8 and hacking instead of pep8 for Python syntax checks

All new findings of flake8 and hacking are ignored for the moment
to only change the used tool with this change. Ignored checks should
be enabled in the future.

Change-Id: I041f7d1427b897692506b2041b8cc50a40d97cc5

stackforge/packstack,stackforge/packstack,mahak/packstack,xbezdick/packstack,palmer159/openstack-test,palmer159/openstack-test,openstack/packstack,palmer159/openstack-test,fr34k8/packstack,fr34k8/packstack,mahak/packstack,xbezdick/packstack,stackforge/packstack,imcsk8/packstack,imcsk8/packstack,openstack/packstack,fr34k8/packstack,mahak/packstack,imcsk8/packstack,openstack/packstack,xbezdick/packstack