should not exclude plugins from flake8 tests

[John Garbutt]

We have pep8 errors sneeking into all the plugins due to the plugins being excluded from pep8 checks.

Unfortunatly, this includes both:
/plugins/xenserver
and
/nova/api/openstack/compute/plugins

We want to exclude the top one, but not the bottom ones.

[John Garbutt (johngarbutt)]

We can't check the the xenserver plugins because they are run in python 2.4, and our flake8 settings enforce the python 2.4 incompatible:
N308 Python 3.x incompatible 'except x,y:' construct

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/35680

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/35680
Committed: http://github.com/openstack/nova/commit/707a7964f417e0df45223ccc2b40d42f944a947c
Submitter: Jenkins
Branch: master

commit 707a7964f417e0df45223ccc2b40d42f944a947c
Author: John Garbutt <email address hidden>
Date: Thu Jul 4 16:56:43 2013 +0100

    Ensure flake8 tests run on all api code

    We need to exclude the plugins/xenserver directory
    because the python2.4 code can't use as in except clauses.
    The existing exclude directory accidentally included some
    code in nova/api/openstack/compute/plugins and the related
    tests. This code is now included in the flake8 tests,
    and the current violations have been fixed up.

    Fixes bug 1197858

    Change-Id: Ib5f1b65d5d793f0f5854e898ca3ce751e43ef233