flake8: move the pinned version of flake8 up to 3.3.0

This just moves flake8 and related tools up to newer versions and fixes
the complaints associated with that.

We added to the list of flake8 ignores:
 H102: do not put vim info in source files
 H304: no relative imports

Also updates and pins the following in the flake8 environment:
  pep8:        1.7.0  => drop  (although hacking still pulls it in).
  pyflakes     1.1.0  => 1.5.0
  hacking      0.10.2 => 0.13.0
  flake8       2.5.4  => 3.3.0
  pycodestyle  none   => 2.3.1

3 files changed, 5 insertions, 4 deletions

diff --git a/tools/hacking.py b/tools/hacking.py
index 6c320935..e6a05136 100755
--- a/tools/hacking.py
+++ b/tools/hacking.py
@@ -165,7 +165,8 @@ if __name__ == "__main__":
         pep8._main()
     finally:
         if len(_missingImport) > 0:
-            print >> sys.stderr, ("%i imports missing in this test environment"
-                                  % len(_missingImport))
+            sys.stderr.write(
+                "%i imports missing in this test environment\n" %
+                len(_missingImport))
 
 # vi: ts=4 expandtab
diff --git a/tools/mock-meta.py b/tools/mock-meta.py
index 82816e8a..f185dbf2 100755
--- a/tools/mock-meta.py
+++ b/tools/mock-meta.py
@@ -21,8 +21,8 @@ import functools
 import json
 import logging
 import os
-import socket
 import random
+import socket
 import string
 import sys
 import yaml
diff --git a/tools/net-convert.py b/tools/net-convert.py
index 870da639..b2db8adf 100755
--- a/tools/net-convert.py
+++ b/tools/net-convert.py
@@ -9,8 +9,8 @@ import yaml
 from cloudinit.sources.helpers import openstack
 
 from cloudinit.net import eni
-from cloudinit.net import network_state
 from cloudinit.net import netplan
+from cloudinit.net import network_state
 from cloudinit.net import sysconfig