Fix `make style-check` errors (#1000)

Using flake8 inplace of pyflakes
Renamed run-pyflakes -> run-flake8
Changed target name to flake8 in Makefile

With pyflakes we can't suppress warnings/errors in few required places.
flake8 is flexible in that regard. Hence using flake8 seems to be a
better choice here.

flake8 does the job of pep8 anyway.
So, removed pep8 target from Makefile along with tools/run-pep8 script.

Included setup.py in flake8 checks

1 files changed, 1 insertions, 1 deletions

diff --git a/cloudinit/distros/__init__.py b/cloudinit/distros/__init__.py
index a634623a..2e629143 100755
--- a/cloudinit/distros/__init__.py
+++ b/cloudinit/distros/__init__.py
@@ -16,7 +16,7 @@ import stat
 import string
 import urllib.parse
 from io import StringIO
-from typing import Any, Mapping
+from typing import Any, Mapping  # noqa: F401
 
 from cloudinit import importer
 from cloudinit import log as logging