Update tox.ini flake8 rules

This change set brings our flake8 ignore rules in line with the core
nova team.  nova-powervm should always be a minimal subset of flake8
ignore rules to the broader nova project.  This change set removes some
old ignore rules that nova had, that they have removed in the past
couple of months.

Change-Id: I82cdcbc79dac7254f768e110d48c66d63274fc93

nova_powervm/tests/__init__.py

@@ -1,15 +0,0 @@
-# Copyright 2014 IBM Corp.
-#
-# All Rights Reserved.
-#
-#    Licensed under the Apache License, Version 2.0 (the "License"); you may
-#    not use this file except in compliance with the License. You may obtain
-#    a copy of the License at
-#
-#         http://www.apache.org/licenses/LICENSE-2.0
-#
-#    Unless required by applicable law or agreed to in writing, software
-#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-#    License for the specific language governing permissions and limitations
-#    under the License.

nova_powervm/tests/virt/__init__.py

@@ -1,15 +0,0 @@
-# Copyright 2014 IBM Corp.
-#
-# All Rights Reserved.
-#
-#    Licensed under the Apache License, Version 2.0 (the "License"); you may
-#    not use this file except in compliance with the License. You may obtain
-#    a copy of the License at
-#
-#         http://www.apache.org/licenses/LICENSE-2.0
-#
-#    Unless required by applicable law or agreed to in writing, software
-#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-#    License for the specific language governing permissions and limitations
-#    under the License.

tox.ini

@@ -32,5 +32,5 @@ commands =
 whitelist_externals = bash
 
 [flake8]
-ignore = E125,E712,H104,H405,H904
+ignore = E125,H405
 exclude =  .venv,.git,.tox,dist,doc,*openstack/common*,*lib/python*,*egg,build,tools