pep8 updated case CI fails in stable OSTF branches

[Sebastian Kalinowski]

New pep8 version introduced new checks that caused CI check to fail for patches like:

https://review.openstack.org/#/c/161512/
https://review.openstack.org/#/c/161233/

We don't want to fix them in stable branches since this is not critical. Solution is to pin pep8 version.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/5.1
Review: https://review.openstack.org/161681

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/161675
Committed: https://git.openstack.org/cgit/stackforge/fuel-ostf/commit/?id=b38332e6741fc4b0ef40a9b4fe9d2804ee6437cc
Submitter: Jenkins
Branch: stable/6.0

commit b38332e6741fc4b0ef40a9b4fe9d2804ee6437cc
Author: Sebastian Kalinowski <email address hidden>
Date: Thu Mar 5 11:41:43 2015 +0100

    Pin flake8 and pep8 version

    If falke8 and pep8 version will be allowed to update without control,
    it would cause future patchsets to fail CI check when new rules
    was added. It is a problem since we do not fix such things in stable
    branches.

    Closes-Bug: #1428587
    Change-Id: I94709d8f310e93b2cee617f3e4a43a64d22916b5

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/161681
Committed: https://git.openstack.org/cgit/stackforge/fuel-ostf/commit/?id=3447260f7f718e3e85d130b2d20a348b3b68b99d
Submitter: Jenkins
Branch: stable/5.1

commit 3447260f7f718e3e85d130b2d20a348b3b68b99d
Author: Sebastian Kalinowski <email address hidden>
Date: Thu Mar 5 11:41:43 2015 +0100

    Pin flake8 and pep8 version

    If falke8 and pep8 version will be allowed to update without control,
    it would cause future patchsets to fail CI check when new rules
    was added. It is a problem since we do not fix such things in stable
    branches.

    Closes-Bug: #1428587
    Change-Id: I94709d8f310e93b2cee617f3e4a43a64d22916b5

[Tatyanka (tatyana-leontovich)]

verified, Thank you